Yeah man, he actually scares me in the second video, haha.
I am rather sure he is Te lead, and most likely LSE. You can just tell he's got 4D Se in the second vid.
Btw, Ne HA can make people come up with some weird (usually false) predictions...
Anyhow, you can see Bill is quite different from Neil.
You may not "believe in" the Reinin dichotomy of Merry vs Serious, but if you can see some merit in it, it should be obvious that Neil is "merry" and Bill is "serious" in comparison.
I believe Neil has got Fe HA, so that also makes people more inclined to see him as Fe lead / ESE. At least it should be obvious to most he is Alpha.
While Bill... nope, not at all.