Sometimes the order of the videos cannot be authored by dragging and dropping. This is a known bug in Yubby. Usually this has to do with either an empty tag field or a strange symbol in either the tag or description field.

There is an easy to use workaround: all you have to do is delete the empty space in the tags or remove the symbol in the description. After doing that everything should work fine again.

Our experience is this happens most often with Vimeo video content (mainly the empty tags).

If this doesn't solve the problem in your situation please let us know!