day 2:
I think that's efficient to scrub videos in pro player like potplayer than in Davinci. So I do bit coding to make this happened.
self note:
blade first, don't bother blade+ripple.
todo:
next time, try using JKL / loop around with blade.
speed it up, 14mins original videos took me 35mins, plus 10mins pre-work in potplayer for bookmarking. :(