Up the thread it was described he released 90 videos, each has 8-10 minutes. So it’s up to 900 hours. But not all the hours clearly.
I was wrong there. for the videos on the the House portal, it was approx 900 minutes which is approx 15 hours.
If there are videos else where, I am unaware of it.
This makes me wonder if maybe he's keeping back a certain group of them for the specific purpose of release at a later opportune time. The old John Mellencamp song talking about "the walls come tumblin' down" keeps going through my mind.
Granted, the above is 100% speculation. But, taking all of Johnson's actions thus far as Speaker into account, I believe we haven't seen the end of the J6 story yet. Not by a long shot.