increase max limit of submisson files from 500kb to 2mb

TASVideos.Common/Constants.cs

@@ -60,7 +60,7 @@ The posts after this message will continue to apply to the submission.
 
 	public const string DefaultPublicationText = "''[TODO]: describe this movie here''";
 
-	public const int MaximumMovieSize = 500 * 1024;
+	public const int MaximumMovieSize = 2048 * 1024;
 	public const int UserFileStorageLimit = 1000 * 1000 * 50; // 50 MB
 }