Google Drive has recently decided to deprecate its support for video streaming (learn more here). For that reason, you may notice the error message "The requested video can not be played. Please contact your administrator" pop up during playback.
We recommend switching the original video source, and using our mp4 uploader instead. Instructions on our mp4 uploader can be found here: https://playposit.uservoice.com/knowledgebase/articles/1107479-how-do-i-upload-a-video-from-my-hard-drive