I don't know who they are, either. They're definitely new to the industry. The first guy was the longest- in the 7.5-8" NBP range. Of course, I can't be sure because of the extremely limited footage. One of the other guys- the guy with the biggest girth- was a bit over 6". Again, I have the same reservations.
I only liked the first vid. The other guys seemed to be assholes, in my view.
You should search for this because it's been discussed several times before. I believe Julian to be close to 8.5" BP (about 8" NBP), which is the longest measurement for a white guy in adult entertainment. Steve Holmes is around the same length. With respect to Julian's girth, I think he's 5.5-5.75".