Thanks for the video! Hand sync is probably the main thing to work on, based on watching that. I’d break it down string change by string change
Considering a phrase like this (sort of C harmonic minor flavored):
B|------------------12 13 15
G|---------12 13 15----------
D|12 13 15-------------------
d u d d u d d u d
I’d focus on nailing this:
G|---------12
D|12 13 15-
d u d d
Making sure you’ve got perfect hand sync, hard accents too for the first downstroke on the D string, as well as the first downstroke on the b string
Then see if you can do this
B|------------------12
G|---------12 13 15---
D|12 13 15------------
d u d d u d d
Same thing, go for perfect hand sync, hard accents on the first downstroke of the D, G and B strings
Also, for a lick like that, you want to make sure you don’t get “lazy” with the fretting hand (not saying you were, I actually wasn’t watching your fretting hand). By that I mean each finger needs to release its tension as the next finger frets. That way you’re never caught off guard when you suddenly need a finger. I see this happen to people if they leave all the fingers down as they ascend then “suddenly” they have to scramble to lift the index finger to fret the next string. The “right way” will have your fretting hand just cycling as if you’re drumming your fingers on the table, like a little motor.