diff --git a/app/Factories/PresentationVideoFactory.php b/app/Factories/PresentationVideoFactory.php
index 54650d20..d0dae4d3 100644
--- a/app/Factories/PresentationVideoFactory.php
+++ b/app/Factories/PresentationVideoFactory.php
@@ -28,6 +28,7 @@ final class PresentationVideoFactory implements IPresentationVideoFactory
     public function build(array $data){
         $video               = new PresentationVideo;
         $utc_now             = new \DateTime();
+
         $video->setYoutubeId(trim($data['you_tube_id']));
         $video->setDateUploaded($utc_now);
 
diff --git a/app/Http/Controllers/apis/protected/summit/OAuth2PresentationApiController.php b/app/Http/Controllers/apis/protected/summit/OAuth2PresentationApiController.php
index c4d175da..13a0057b 100644
--- a/app/Http/Controllers/apis/protected/summit/OAuth2PresentationApiController.php
+++ b/app/Http/Controllers/apis/protected/summit/OAuth2PresentationApiController.php
@@ -82,6 +82,7 @@ final class OAuth2PresentationApiController extends OAuth2ProtectedController
 
     public function addVideo(LaravelRequest $request, $summit_id, $presentation_id){
         try {
+
             $summit = SummitFinderStrategyFactory::build($this->summit_repository)->find($summit_id);
             if (is_null($summit)) return $this->error404();
 
@@ -130,4 +131,83 @@ final class OAuth2PresentationApiController extends OAuth2ProtectedController
             return $this->error500($ex);
         }
     }
+
+    public function updateVideo(LaravelRequest $request, $summit_id, $presentation_id, $video_id){
+        try {
+
+            $summit = SummitFinderStrategyFactory::build($this->summit_repository)->find($summit_id);
+            if (is_null($summit)) return $this->error404();
+
+            if (!$request->isJson()) {
+                return $this->error412(array('invalid content type!'));
+            }
+            if(!Request::isJson()) return $this->error403();
+
+            $data = Input::json();
+
+            $rules = array
+            (
+                'you_tube_id'     => 'required|alpha_dash',
+                'name'            => 'sometimes|required|text:512',
+                'description'     => 'sometimes|required|text|max:512',
+                'display_on_site' => 'sometimes|required|boolean',
+            );
+
+            $data = $data->all();
+            // Creates a Validator instance and validates the data.
+            $validation = Validator::make($data, $rules);
+
+            if ($validation->fails()) {
+                $ex = new ValidationException;
+                $ex->setMessages($validation->messages()->toArray());
+                throw $ex;
+            }
+
+            $this->presentation_service->updateVideo($presentation_id, $video_id, $data);
+
+            return $this->updated();
+        }
+        catch (EntityNotFoundException $ex1)
+        {
+            Log::warning($ex1);
+            return $this->error404();
+        }
+        catch (ValidationException $ex2)
+        {
+            Log::warning($ex2);
+            return $this->error412($ex2->getMessages());
+        }
+        catch (Exception $ex)
+        {
+            Log::error($ex);
+            return $this->error500($ex);
+        }
+    }
+
+    public function deleteVideo($summit_id, $presentation_id, $video_id){
+        try {
+
+            $summit = SummitFinderStrategyFactory::build($this->summit_repository)->find($summit_id);
+            if (is_null($summit)) return $this->error404();
+
+            $this->presentation_service->deleteVideo($presentation_id, $video_id);
+
+            return $this->deleted();
+        }
+        catch (EntityNotFoundException $ex1)
+        {
+            Log::warning($ex1);
+            return $this->error404();
+        }
+        catch (ValidationException $ex2)
+        {
+            Log::warning($ex2);
+            return $this->error412($ex2->getMessages());
+        }
+        catch (Exception $ex)
+        {
+            Log::error($ex);
+            return $this->error500($ex);
+        }
+    }
 }
\ No newline at end of file
diff --git a/app/Http/routes.php b/app/Http/routes.php
index 924573fa..ae650bf6 100644
--- a/app/Http/routes.php
+++ b/app/Http/routes.php
@@ -117,6 +117,10 @@ Route::group(array(
                         Route::get('', 'OAuth2PresentationApiController@getPresentationVideos');
                         Route::get('{video_id}', 'OAuth2PresentationApiController@getPresentationVideo');
                         Route::post('', 'OAuth2PresentationApiController@addVideo');
+                        Route::group(array('prefix' => '{video_id}'), function () {
+                            Route::put('', 'OAuth2PresentationApiController@updateVideo');
+                            Route::delete('', 'OAuth2PresentationApiController@deleteVideo');
+                        });
                     });
                 });
             });
diff --git a/app/Models/Foundation/Summit/Events/Presentations/Materials/PresentationMaterial.php b/app/Models/Foundation/Summit/Events/Presentations/Materials/PresentationMaterial.php
index 68432019..b952ca09 100644
--- a/app/Models/Foundation/Summit/Events/Presentations/Materials/PresentationMaterial.php
+++ b/app/Models/Foundation/Summit/Events/Presentations/Materials/PresentationMaterial.php
@@ -58,6 +58,11 @@ abstract class PresentationMaterial extends SilverstripeBaseModel
         $this->presentation = $presentation;
     }
 
+
+    public function unsetPresentation(){
+        $this->presentation = null;
+    }
+
     /**
      * @return int
      */
diff --git a/app/Models/Foundation/Summit/Events/Presentations/Presentation.php b/app/Models/Foundation/Summit/Events/Presentations/Presentation.php
index fd7ed240..731e1de3 100644
--- a/app/Models/Foundation/Summit/Events/Presentations/Presentation.php
+++ b/app/Models/Foundation/Summit/Events/Presentations/Presentation.php
@@ -182,6 +182,24 @@ class Presentation extends SummitEvent
         return count($this->getVideos()) > 0;
     }
 
+    /**
+     * @param int $video_id
+     * @return PresentationVideo
+     */
+    public function getVideoBy($video_id){
+        return $this->materials
+            ->filter(function( $element) use($video_id) { return $element instanceof PresentationVideo && $element->getId() == $video_id; })
+            ->first();
+    }
+
+    /**
+     * @param PresentationVideo $video
+     */
+    public function removeVideo(PresentationVideo $video){
+        $this->materials->removeElement($video);
+        $video->unsetPresentation();
+    }
+
     /**
      * @return PresentationSlide[]
      */
@@ -302,7 +320,7 @@ class Presentation extends SummitEvent
 
 
     public function unsetModerator(){
-        $this->moderator = nul;
+        $this->moderator = null;
     }
 
 }
diff --git a/app/Models/Foundation/Summit/Factories/IPresentationVideoFactory.php b/app/Models/Foundation/Summit/Factories/IPresentationVideoFactory.php
index 3c83e04d..c41641a7 100644
--- a/app/Models/Foundation/Summit/Factories/IPresentationVideoFactory.php
+++ b/app/Models/Foundation/Summit/Factories/IPresentationVideoFactory.php
@@ -11,6 +11,7 @@
  * See the License for the specific language governing permissions and
  * limitations under the License.
  **/
+use models\summit\PresentationVideo;
 
 /**
  * Interface IPresentationVideoFactory
diff --git a/app/Services/Model/IPresentationService.php b/app/Services/Model/IPresentationService.php
index 69bec8b2..6eb4106c 100644
--- a/app/Services/Model/IPresentationService.php
+++ b/app/Services/Model/IPresentationService.php
@@ -27,4 +27,20 @@ interface IPresentationService
      * @return PresentationVideo
      */
     public function addVideoTo($presentation_id, array $video_data);
+
+    /**
+     * @param int $presentation_id
+     * @param int $video_id
+     * @param array $video_data
+     * @return PresentationVideo
+     */
+    public function updateVideo($presentation_id, $video_id, array $video_data);
+
+
+    /**
+     * @param int $presentation_id
+     * @param int $video_id
+     * @return void
+     */
+    public function deleteVideo($presentation_id, $video_id);
 }
\ No newline at end of file
diff --git a/app/Services/Model/PresentationService.php b/app/Services/Model/PresentationService.php
index 3c18beda..c26a603e 100644
--- a/app/Services/Model/PresentationService.php
+++ b/app/Services/Model/PresentationService.php
@@ -16,6 +16,7 @@ use models\exceptions\EntityNotFoundException;
 use models\exceptions\ValidationException;
 use models\summit\factories\IPresentationVideoFactory;
 use models\summit\ISummitEventRepository;
+use models\summit\Presentation;
 use models\summit\PresentationVideo;
 use libs\utils\ITransactionService;
 
@@ -80,4 +81,74 @@ final class PresentationService implements IPresentationService
 
         return $video;
     }
+
+    /**
+     * @param int $presentation_id
+     * @param int $video_id
+     * @param array $video_data
+     * @return PresentationVideo
+     */
+    public function updateVideo($presentation_id, $video_id, array $video_data)
+    {
+        return $this->tx_service->transaction(function() use($presentation_id, $video_id, $video_data){
+
+            $presentation = $this->presentation_repository->getById($presentation_id);
+
+            if(is_null($presentation))
+                throw new EntityNotFoundException('presentation not found!');
+
+            $video = $presentation->getVideoBy($video_id);
+
+            if(is_null($video))
+                throw new EntityNotFoundException('video not found!');
+
+            if(!$video instanceof PresentationVideo)
+                throw new EntityNotFoundException('video not found!');
+
+            if(isset($video_data['name']))
+                $video->setName(trim($video_data['name']));
+
+            if(isset($video_data['you_tube_id']))
+                $video->setYoutubeId(trim($video_data['you_tube_id']));
+
+            if(isset($video_data['description']))
+                $video->setDescription(trim($video_data['description']));
+
+            if(isset($video_data['display_on_site']))
+                $video->setDisplayOnSite((bool)$video_data['display_on_site']);
+
+            return $video;
+
+        });
+    }
+
+    /**
+     * @param int $presentation_id
+     * @param int $video_id
+     * @return void
+     */
+    public function deleteVideo($presentation_id, $video_id)
+    {
+        $this->tx_service->transaction(function() use($presentation_id, $video_id){
+
+            $presentation = $this->presentation_repository->getById($presentation_id);
+
+            if(is_null($presentation))
+                throw new EntityNotFoundException('presentation not found!');
+
+            if(!$presentation instanceof Presentation)
+                throw new EntityNotFoundException('presentation not found!');
+
+            $video = $presentation->getVideoBy($video_id);
+
+            if(is_null($video))
+                throw new EntityNotFoundException('video not found!');
+
+            if(!$video instanceof PresentationVideo)
+                throw new EntityNotFoundException('video not found!');
+
+            $presentation->removeVideo($video);
+
+        });
+    }
 }
\ No newline at end of file
diff --git a/database/seeds/ApiEndpointsSeeder.php b/database/seeds/ApiEndpointsSeeder.php
index 51786de5..034c20d1 100644
--- a/database/seeds/ApiEndpointsSeeder.php
+++ b/database/seeds/ApiEndpointsSeeder.php
@@ -561,6 +561,26 @@ class ApiEndpointsSeeder extends Seeder
             )
         );
 
+        ApiEndpoint::create(
+            array(
+                'name' => 'update-presentation-video',
+                'active' => true,
+                'api_id' => $summit->id,
+                'route' => '/api/v1/summits/{id}/presentations/{presentation_id}/videos/{video_id}',
+                'http_method' => 'PUT'
+            )
+        );
+
+        ApiEndpoint::create(
+            array(
+                'name' => 'delete-presentation-video',
+                'active' => true,
+                'api_id' => $summit->id,
+                'route' => '/api/v1/summits/{id}/presentations/{presentation_id}/videos/{video_id}',
+                'http_method' => 'DELETE'
+            )
+        );
+
         //members
 
         ApiEndpoint::create(
@@ -575,7 +595,6 @@ class ApiEndpointsSeeder extends Seeder
 
         // notifications
 
-
         ApiEndpoint::create(
             array(
                 'name' => 'get-notifications',
@@ -689,9 +708,16 @@ class ApiEndpointsSeeder extends Seeder
         $endpoint->scopes()->attach($summit_external_order_confirm->id);
 
         //write videos
+
         $endpoint = ApiEndpoint::where('name', '=', 'create-presentation-video')->first();
         $endpoint->scopes()->attach($write_videos_scope->id);
 
+        $endpoint = ApiEndpoint::where('name', '=', 'update-presentation-video')->first();
+        $endpoint->scopes()->attach($write_videos_scope->id);
+
+        $endpoint = ApiEndpoint::where('name', '=', 'delete-presentation-video')->first();
+        $endpoint->scopes()->attach($write_videos_scope->id);
+
 
     }
 
diff --git a/tests/OAuth2SummitApiTest.php b/tests/OAuth2SummitApiTest.php
index eaac4a75..80ccafdf 100644
--- a/tests/OAuth2SummitApiTest.php
+++ b/tests/OAuth2SummitApiTest.php
@@ -1695,6 +1695,76 @@ final class OAuth2SummitApiTest extends ProtectedApiTest
 
     }
 
+    public function testUpdatePresentationVideo()
+    {
+        $params  = array
+        (
+            'id'              => 7,
+            'presentation_id' => 15404,
+            'video_id'        => 32801
+        );
+
+        $headers = array
+        (
+            "HTTP_Authorization" => " Bearer " .$this->access_token,
+            "CONTENT_TYPE"       => "application/json"
+        );
+
+        $video_data = array
+        (
+            'you_tube_id' => 'cpHa7kSOur0',
+            'name'        => 'test video update',
+        );
+
+        $response = $this->action
+        (
+            "PUT",
+            "OAuth2PresentationApiController@updateVideo",
+            $params,
+            array(),
+            array(),
+            array(),
+            $headers,
+            json_encode($video_data)
+        );
+
+        $content = $response->getContent();
+        $this->assertResponseStatus(204);
+
+    }
+
+    public function testDeletePresentationVideo()
+    {
+        $params  = array
+        (
+            'id'              => 7,
+            'presentation_id' => 15404,
+            'video_id'        => 32800
+        );
+
+        $headers = array
+        (
+            "HTTP_Authorization" => " Bearer " .$this->access_token,
+            "CONTENT_TYPE"       => "application/json"
+        );
+
+        $response = $this->action
+        (
+            "DELETE",
+            "OAuth2PresentationApiController@deleteVideo",
+            $params,
+            array(),
+            array(),
+            array(),
+            $headers
+
+        );
+
+        $content = $response->getContent();
+        $this->assertResponseStatus(204);
+
+    }
+
     public function testGetMyMemberFromCurrentSummit(){
 
         $params  = array