I can embed the YouTube videos by going through Videos. I can edit them and change the category to Groups. Then go into a group and Add Video. The YouTube Video shows up there and can be selected. Choose Submit and it confirms. The video shows below the player along with any others in that group. Non-YouTube videos that were uploaded all play when clicked on. The YouTube videos start to load when clicked on and then get that "File not found" error. Tried with different members and get the same result. Can go back to any other place where the videos show and the same YouTube videos play.
It would also be nice if the same video upload choices existed in Groups. The one in there leaves a lot to be desired.
Thank