I think on video my mannerisms seem more INFP like, according to descriptions I've seen and other INFP videos. The eyes dart around a bit, expressive, not focused on the object. Voice when talking about feelings tends to be softer, which is more Fi-like. But when it comes to talking about thoughts, it gets more terse and open. Generally I seem pretty laid-back in videos, which doesn't negate the Ni-Ti description though.