The title tells it all. I have found one similar question but it is outdated from 2013 and not related to Chrome.
How can I enable hardware acceleration for flash on Intel graphics?
When I go to chrome://gpu it gives me this:
However, it also says that video decode is unavailable:
How can I be sure that I'm using my GPU for Flash on Google Chrome, which is the only way to use Flash on Ubuntu since Adobe droped support for Linux?
When I do right click on a flash video, 'Enable hardware acceleration' is on.