I'd choose the one that has other cyclists
windy country road w cars passing in both directions but not too many, but then some clowns with water guns assault me (toward the end of the clip)
least favorite section of my old commute (2009-10) on Route 20, Wayland, MA. (aka Boston Post Rd between Concord Rd & Landham Rd) I affectionately nicknamed "a kill zone". I was always so glad to get to the turnoff after the descent. I think this (2014) clip is from a quiet Sunday morning, not a weekday commute, which would have had much more traffic. on the return trip I would avoid that .8 mile stretch using a bypass (Greenhill Rd to Goodman's Hill Rd to Concord Rd) shortcut cuz I'd be on the other side near it. but making a left on the road w/o a traffic light seemed too sketchy
