Race gas timing, hearing a different opinion.

Pump Gas and Race Gas are just names. What is needed is are they oxygenated or 100% hydrocarbon fuels. That impacts Air/Fuel ratio which impacts performace significantly. Race gas with high aromatics can have a slower burn rate which may require more timing, but the Engine Masters video is correct for at least modern cylinder heads. Timing is a design parameter for heads to minimize NOx emissions. Less timing, less peak cylinder temperature, less NOx. Small Block Mopar engines with the spark plug more centrally located require less spark timing for peak power as the flame front has less distance to travel to cross the combustion chamber. B-Engines with the lower positioned spark plug (like SMC's) need more timing to account for the longer flame travel. The goal is to reach peak cylinder pressure just after TDC for peak performance and economy.
E10 and more importantly, E15, common pump gal, will require larger jetting to account for the oxygenates (ethanol) in the fuel. Switching to Race Gas w/o ethanol will be running rich without a jet change. Some race gas does contain ethanol, so you have to ask and/or tune for best power on the gas you run.