Very useful. Thanks a lot!
As a feature suggestion:
If one could disable/enable it on page-level, that would be nice.
I need "disable_polymer=true" especially for other peoples playlists that I want to merge into my own playlists. The button is only available with polymer off.
For just viewing/listening to vids sometimes I like the new style. So switching dynamically by a hotkey or UI, would come in nice.
