I really wanted to play in Japanese and lack of lip sync wasn't really the limiting factor it was more that I missed a bunch of the dialogue when I was doing anything other than riding a horse when they spoke to me. I didn't want to feel like I was staring at the bottom third all the time, its fine in media for me because I'm not controlling anything, in a game looking away for as long as it takes to read subtitles is enough time to fuck something up.
Its not the same as glancing at a HUD for me, in some racing games I dark back and forth between the minimap/map and the road constantly but a 3rd person action game is a bit more involved than a racing game imo.
BTW why is the lighting so different in the language comparison near the start, just because its an in-game rendered cutscene and the time of day happened to be different or is that down to the PS5 version specifically rendering in real-time vs. pre-rendered on PS4? I don't know how I feel about it if its the latter as that means the cinematography changes depending when you do things and I'd prefer it to be locked to what the director/whoever decides these things in a game rather than based on the current ToD/conditions as thats the reason I thought AC: Valhalla could look like crap or really great depending on ToD.