http://www.snopes.com/2016/10/18/project-veritas-election-videos/ I'm not so sure I'd be hitching my wagon to James O'keefe anymore. Or at all.
I've already known about his past video manipulation. I watch these videos with that in mind. What you can't deny is what people are saying in these videos, and the fact that two of the DNC agents were fired. I can tell when the plant asks leading questions. I ignore that. But when the suspect goes off like this man did and says "this is what were going to do" it's pretty telling. Same with the previous videos. There is definitely some meat here; not all, but some.
O'Keefe edits out the part where he asks people to pretend they are dirty. Duh. But, this is more proof than Trump saying "I guess so"