2 questions right now:
1) Do you collect every key in each dungeon?
2) Since keys do not respawn after being collected, should they be considered a collectable you have to get in order to "100%" the game?
I just watched the 2nd dungeon and it looked like you skipped a locked door in order to save a key for a different door to avoid getting another key. I just watched the whole TAS and it looks like you skipped keys in a fair few of the dungeons. Having to get all the keys would mean more of this amazing game gets shown off and it also of course better fits the defined 100% specification in the Op too (all dances, all collectables,
and all items).
Edit: There were 3 moments when the subtitles had minor mistakes in them, I've pointed them out and when they occur in this image gallery:
http://imgur.com/a/W05XA
Overall, a very excellent and entertaining TAS, significant improvement in entertainment over the old run.