Try doing a full reset on Google Chrome.
Settings - > Advanced - > Scroll all the way down and click on "Restore settings to their original defaults".
If that does not work , uninstall Google Chrome. Run a registry cleaner like program (I recommend using CCleaner or bleachbit and clean out temporary files)
Reinstall Chrome and try it.
I would run a antivirus program as well just to be safe in case it may be a file that is disrupting google chrome. Use Malwarebytes.
If you still have the issues after all that - run Google chrome, play the video and check what processes are running the background to see if you notice anything weird.
If you see something like "Google Installer" - just end the process.
Ok...I did one and two.... problem still persists.
Then I played the video and open task manager..... at this point I had a total of 7 tabs open, 4 of which were youtube tabs, two rest era and two VGC.
The strange thing is that I am seeing like 23 open sinatances in chrome.... all of them are basically not doing anything so I don' know where they came from and what they are even doing there. But the one instance that is playing the video is using only like 6% CPU and 30% GPU and around 500MB of RAM.
I really can't get it..... And I have ero extensions installed. And practically no software installed either.