It isn’t, you can get SFF PCs for as little as $75 on eBay that have Quicksync CPUs and will run circles around a RPi, especially if you have to do any transcoding. They are also really power efficient… 7-20W idles.
SBCs really should no longer be considered for selfhosting unless you are A) in an extremely power constrained environment like an off-grid RV or vanlife situation or B) clustering