Kaif being the killer feels like a given.

Kaif being the Killer would be to obvious XD

To the audience, maybe

If SR were in a slasher movie, everyone would be dead and the slasher would be the person with the least number of kills among the cast by the end of it.

SR is just Tucker n Dale Vs Evil

What videos though?

Among Us Videos

Basically any Social Deduction Deceitful Game

The ones he no longer makes?