Dope videos!
I do it the same way with the bassnotes by Low-Passing the sample. Great trick.
I personally cut out like half the bass of my sample so that the original bassline is still hearable but i can play some bassnotes in key with it.
Cause 2 basses usually don't mix well.
I don't literally replay the bassline always but put short bass-notes in key with like a long bass-note that's in the original sample.
Example: