I love the performance decks idea! Maybe the rule could be one song per artist?

IDK because sometimes, like wait I will find examples:

Hyunjoong's KISS KISS & NU'EST's FACE - Sometimes idols do pre-recorded things like this for lives, and they would make really good decks IMO, and I actually prefer, in Hyunjoongs case, watching this 'live' video over the actual music video.

I would also like to see idol related dramas or... stuff like that.

(/whispers/ I am a SM stan too ^^)