According to the article O'Keefe is asking others to view and transcribe the tapes so it doesn't appear that he even knows what's on it yet.
Here is the first transcript I’ve found on Reddit:
Hour 3 of 119
Already quite interesting. Some of the redditors weren’t politically aware in 2009 so may miss some or most references.
I think that is more correctly "help" view and transcribe the tapes. Apparently there are many hours of tapes to be viewed and transcribed. I seriously doubt that O'Keefe doesn't know what is on some of them already.