> So I think we're seeing more of a bifurcation: in-depth longform videos are becoming 30, 40, 60, even 90 minutes long, whereas anything shorter than 10 minutes is being compressed to 30-60 seconds.

Could it be that the shorter videos that are now 30-60 seconds present the same information as they did when they were ~10min, just without all extra prologue, epilogue, and sponsor inserts? Wasn't one of the reasons they were ~10min in the first place simply to get monetized better?

I think we saw 7 minute videos become 10 minutes, not a 20x increase in length for super short-form ones.