I use an extension for Google chrome called Audio Channel, version 2.7.4. It allows you to turn up the volume in videos with quiet audio tracks or force mono when you need it, like in this case.
I love Dan’s videos, but one small correction: The Cruzer doesn’t have a stabilator, it has a fixed horizontal stabilizer with a separate elevator. Great airplane, and great (as always) review Dan!
You mentioned the rudder was a little stiff. The old Zenith bungee system causes rudder stiffness. Zenith has a new puck or "donut" nose gear suspension system that virtually eliminates any rudder stiffness and makes the controls perfectly harmonious.