That’s his effort at stringing the listener along. Otherwise everyone would click out after 2 mins and he wouldn’t get his revenue.
All of these fellow YouTubers that have made videos are doing so to take a slice of the audience share. They may not make money off a video if they share audio from the whatever the guitarist is called, but they get the increase in subscribers and ratings, as well as a boost for their other videos that do make revenue.
And as for stealing licks and passing them off as your own, jazz soloists did this way back when. Only difference is they couldn’t transcribe them so easily note for note as most recordings were bootleg. As with any music you create, get it registered on PPL and PRS.