I have a question about what you are saying here. Ok, so if he's playing in E minor, this says to me he's playing in the relative minor if G. (If the listed chord progression is correct) Could he not be playing different modes of the key and just land on the E when appropriate to reinforce the tonality? My take it that just because you play in different modes, doesn't mean you have to slave yourself to root notes. E minor (aeolian) and G major (Ionian) all contain the exact same notes. All of the modes of any given key are all of the same notes. To me, playing different modes is just a way of getting you around the fretboard.
Just wondering about your take...
1st, @HeadyVan: You're missing the point. I don't mean to promote ignorance. Here's what I am promoting:
Yes, you should be aware that the relative major of E minor is G major. That's important. It also sounds good to play G major over E minor. It sounds good to play off the 9. It sounds good to play HW diminished over the V chord in a minor key. But you should also be aware that the E minor is clearly the dominant tonality in the clip. To call it G major would be wrong. You MUST service the key sometimes.
BUT
If you are playing a tune that has II-V cycles and key changes, the key is the important part, as well as the quality of the V chord. The root of each chord in each key is not something to focus on when soloing, and that's what happens when you think, in the first 4 bars of a tune like All The Things "F aeolian, Bb dorian, Eb mixo, Ab major." That's unnatural. It is technically true, but it's adding information that is not necessary to playing a good bebop solo, in fact it is a hinderance and honestly I think a lot of people teach that way because they themselves haven't figured it out yet.
Here's the thing, though.
This video is a bad video to have this discussion around because it's a modal video. There is no strong V chord. If the D chord was a B chord, it would be a better example.