The video is interesting enough but won't change how I do any future builds.
I have a 10.5" 607 because it's badass, my go to favorite is the xm 177(e2) with 11.5" barrel
next most favoritest is a 20" A1
most are 1-12" and I have one 1-14"
52-55 gr projectiles and I'm happy
some day I may pick up a crate of 62 gr, just to see how they perform but my platforms aren't built around a 1-7 or 1-8"
a 20" isn't too cumbersome for urban settings if velocity was remotely a concern, and 10.5-11.5" reaches out far nuff also