It's just as simple as in the video. Don't sweat it too much. Idk if PO drilled my bars or not, haven't checked yet, but on my previous bike i didn't drill them. so much fuss over something useless. tighten up the screws, or put some electrical tape around the bar. i'd rather be able to move things around to get them where they are most comfortable. can't imagine slamming on the controls that hard they move, if they go loose just tighten them up.
I have UL's. i'm 5'5" and not long armed, i find the ULs a little wide but haven't committed to cutting them. might just slide everything in a little. IIRC there's about an inch on each side.