Sorry, I missed this. Hopefully you'll see my reply.
Lag certainly was a problem for me with earlier pi models as well. The Raspberry Pi 4 doesn't have the lags, or at least I don't experience any. It's actually smoother than my laptop with YouTube videos. And it's quite fine with both hdmi ports in use. Probably not multiple videos at one time, of course.
Lag certainly was a problem for me with earlier pi models as well. The Raspberry Pi 4 doesn't have the lags, or at least I don't experience any. It's actually smoother than my laptop with YouTube videos. And it's quite fine with both hdmi ports in use. Probably not multiple videos at one time, of course.