Thanks for answering, i included the OALPCustom in my project and I noticed that the Thumbnail.Data is obsolete, and it says that "Since version 6.1 the blob data is stored in the Blob Storage for the MediaContent". Also the method CreateThumbnail is obsolete.
Is there a way to upload the video thumbnails using the blob storage?
var manager = LibrariesManager.GetManager();
var id = manager.GetVideos().Where(v => v.Title ==
var thumbnailData = File.OpenRead(
(MemoryStream ms =
var data = ms.ToArray();