His older stuff is a good way to learn basic DCS dogfighting but the impetus to constantly push more new videos has really killed the overall quality and now it's a lot of a "user mod super plane x versus user mod super plane y."
Growling Sidewinder is alright, but you have to be aware of the limitations of DCS (the simulator he uses) if you want to take it as representative of modern aerial combat. For one, DCS's flight model is based only on open source data, so a lot of fighter's statistics are based on speculation and extrapolation. Second, DCS doesn't do a lot of EWAR and detection accurately, which is especially important for modern 5th gen fighters. And then of course modern air combat is rarely 1v1 WVR, but it's hard to get a couple hundred people running in a single DCS server so there's no easy way to show off modern larger scale tactics