You expressed very little Fi in that video, whereas you expressed some Ne, so I guess I'd say Alpha.
lol, no, you will not be on the posters for ENFp, haha! You could be ENFP in MBTI--I wouldn't bet against that, but honestly, I do not know--and I'm not 100% convinced that you're not ENFp in Socionics, but I'd say that there are two or three other types that seem more likely based on your video.
As to ENFj--I can spot those guys a mile away, lol, and yeah, I doubt it... Pat Riley's an ENFj who is fresh in my mind--pugnacious, very strong emotionality, almost kinda intimidating... None of those adjectives well-describe the person in the video. The person in the video is soft-spoken, easy-going, seemingly sensitive... Reminiscent of some interviews with James Taylor... There's nothing loud, brash, or 'showy' about how you're presenting yourself.
This is something to think about, I guess: you don't VI as ENFp. (Personally, I think that VI can be way off sometimes--not the most reliable method. So take this for what it's worth
Fi-ENFps often have thick lips, square jaws, etc. Think Tom Brady, Jude Law, ppl like that... Ne-ENFp works slightly better for you--think Tim Roth, or Pierre Richard.
There are some ESTjs who can be fairly mellow on occasion--I've seen some interviews with Sir Alan Sugar where he comes across similar to how you did in your video--in other words, I wouldn't totally rule out that type yet.
However, I agree with those who've suggested Ne-INFj as the most likely type. (Think David Duchovny--he's Ne-INFj.) That particular subtype sometimes comes across as 'irrational.'
I can see the Bill Cosby resemblance to David West in your avatar, haha... Also, I can understand why you identify with D. West... I think that some of the suggestions in this thread have been good so far.