I just tried it.  Looks fine on my computer.  You might want to restart to clear out your memory.  Try clearing your browser cache too  of it still persists.

Rebooted, cleared cache...nothing

Can you try from a different browser?
Also try from a different computer if possible.

Other than that I don't know what to tell you.  I tried 3 browsers and 2 computers and works just fine on my end.

Looks fine to me, too. I tried from 3 different computers and my phone. No distortions. That video has been online since April of 2020 and has been viewed thousands of times. No other complaints. It's got to be something on your PC. Do other videos on the site look OK?

You can also save the video file locally. Click on the link to play the video. Once it starts playing, right-click on it and select "Save Video As..." it will download to your PC. You can then play it in whatever video players you have on your system.

All my other downloaded videos play normally

Your other videos that I watched all played fine

That video may have not downloaded 100% correctly the first time you played it which can cause a corrupted file in your browser cache. That's why clearing your cache usually works. You can also try using an incognito window.

I'll try it again

Or try using a different browser. If you've got Chrome, try switching to Edge.

Thanks Richard it is working in edge. Was working also in my Adobe Premiere Pro. Can't explain it.

I assume your other browser is Chrome? Clear the cache and any cookies from my site. Delete any temporary Internet files. Try an incognito window.

Chrome & Brave...I'll use edge for your site which is already bookmarked. Thanks again!