He seems pretty excited to have been chosen for this video, a potential boon for his popularity.
Right, he is ambitious. By "chosen" I mean they allowed him.I'm not sure if he was chosen given that at the very start of the video, the narrator says that while they were interviewing another teacher who does Bak Mei, they "bumped into" this Taiji guy who was "very keen" on showing them his Taiji. The video takes place in a Bak Mei school and the title of the video says "bonus ep". Every other episode so far has been about Southern Chinese martial arts. I don't think planned on meeting a Taiji guy.
I am getting the impression that Philip chose them as opposed to the other way around.