I would just like to mention that I am also having this issue. It seems to occur when more than two characters are levelling up at the same time. Dismissing only one of the followers seems to allow me to get through a level up, since I left one of my main characters dead during part of a fight so that they would not level up at the same time. As long as I make the level up arrows go away on the portraits before picking the follower back up, it seems that the video won't crash.
Confirming this! I were just about to flip tables and call quits on this game forever (so. many. bugs. yet. so. wonderful.), but something silly as this fixed it.
You sir are a gentleman and a scholar.
