Here is a video from LA Music Academy, one of probably a thousand music schools in LA I would imagine. I think that Alphonso Johnson is the dean of either the bass department or the entire school if I remember correctly, but I am too damn lazy to google that. But I am pretty sure.
This guy takes the first 8 bars of the "Take the A Train" progression and talks about how to work out the chord tones. Good stuff for bass lines or solos.
They have a bunch of other bass videos posted as well a couple about double thumbs and some other solo videos. Check 'em out.