So, what are you exactly saying here then? You're implying, since the video quality isnt so good, you cant make proper judgment of the said video clip. Your reason for not being able to make proper evaluation is based on crappy youtube quality. Crappy quality or not, John pattitucci failed to deliver the Jamerson feel. So watching a jamerson clip on youtube would also result in losing that 'magic'. Your 35 years of playing experienece is irrelevant to logic. Video being out of sync has no effect on the sound clip, nor does bad sound quality have any effect on 'groove'. Unless the sound clip fluctuates in speed and volume. Again, youtube quality can't be much worse than casette, vhs or vinyl from the 80s.
You're implying a piece of music can only be appreciated if it's played on a hi fideliy system. Good music is still good, even on lo fi.