at 6:31 to 6:32 over C-7, the descending line sounds like the notes of Eb M7 (#5), which is the 3rd chord of C melodic minor. There might be other ways to think about this (e.g., it also sounds like an F Lydian 7 lick). If anyone has any suggestions, let me know. Thanks
Here is Tomo's comment:
"Thanks for your post. There is a simpler way to think about this: it’s all about melodic minor over C-7! There is no need to think about the 3rd chord from the C melodic minor scale. C melodic minor is the same as B Altered scale and F Lydian b7 scale."