New feature suggestion : favorites folders

Sorry if someone has already suggested this, but I would love to see FB come out with a new feature to favorite workouts into different folders or playlists. For example, if I find a HIIT workout I particularly like, I would want to be able to save it to a "HIIT workouts" favorites folder I can come back to. So if I'm in the mood for pilates, strength, etc, I can find my favorite workouts in my own folders.

Would anyone else appreciate this feature?