Hand written assembly is pretty common in video, no matter what they say. All modern video codecs have hand written assembly for all modern SIMD extensions, even on ARM. They didn't say anything about where these numbers come from. Likely compared against unoptimized C code. There will never be a case where having AVX-512 will give you that kind of speedup, because there will be fallbacks for more common extensions.
I attached an esp + relay to my garage door. It is probably the first project where I really use an esp. I flashed it with Tasmota, but don't really nike it. I have no home assistant or similar running, so I open the webpage manually...