berble I was having the same problem, but I think now it's fixed.
You need to disable the hardware acceleration on your browser. I was using Chrome and was lagging on Youtube and Twitch, now the icon of instant replay doesn't even show on the corner of the screen, which is good. Problem solved.
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Thank you for your answer, but switching hardware acceleration off doesn't sound like a good idea because it significantly reduce your cpu usage when playing youtube, twitch, etc videos. After switching it off i went from smooth youtube 4k 60fps videos to constant 100% cpu usage, horrible lags and my entire pc choking. I also like to play some cpu-heavy games on my main screen when i watch twitch streams on second screen, without hardware acceleration i loose a lot fps.
It might be workaround, depending on how you use your pc so it's good to know, but it's not a solution.
The worst thing is that i reinstalled my system, this problem still exists on current driver and it doesn't seem to be a common issue. I'm confused
Yeah, I've just tested a 4K video on Youtube, it lags a lot. I Guess I'll have to stay with PlaysTV for now.
Try this Windows 10 update(it is not on windows update though), for the multi-monitors delay issue fix, but on your own risk and I do not know if this helps or not, just a hope.
What KB 3216755 fixed:
- Addressed known issue called out in KB3213986—Users may experience delays while running 3D rendering apps with multiple monitors.
As for VP9 on Chrome try this tip by launching Chrome from command-line(Win key+R):
chrome.exe --ignore-gpu-blacklist --enable-accelerated-vpx-decode=2
There are three posts about ReLive VP9 issue: