60fps 4k video low performance

Solution 1:

This link provides some good (mostly still relevant) steps:

Basically, if using Chrome, go to:

chrome://gpu

You will see a list of GPU features the browser can use. On my up to date Intel graphics system, I see this:

Video Decode: Software only, hardware acceleration unavailable

I expect you probably see something similar. You can try the suggestions on that link of getting video decode working, but I can tell you that you might not get it all working, and it also might not be stable (graphics errors, crashes, etc). The options to change are all in:

chrome://flags (option: "Override software rendering list")

Again, be warned, these can destabilize your browser performance.

The Ubuntu Desktop team has also been working on this problem and has a call for testing out for 18.04 for Intel. In case anyone gets to this question/answer and has other graphics cards.