AlanB,
That last method of " collaring" is the third method I tried to explain above.
The reason he starts the thread as he does is not to save thread, but to save time in production tying. No reaching for scissors and cutting the tag or snapping to break off. He also applies thread by keeping the bobbin holder very close to the hook shank.
I have seen many folks teach beginners how to apply dubbing to thread.......many expert tiers included. I don't recall anyone who has suggested any method but applying the dubbing by rubbing in the same direction.......
That is not to say you can't rub it back and forth, just that it conflicts with " conventional wisdom", but he produces very nice dubbed thread.
The other thing he does is to apply the correct amount of material. He is not wasting time removing some dubbing or adding more. He is a real production minded tier.