YouTube videos are lousy. Moreover, if you upload a high quality video clip, the service will still worsen it. Why it happens? Caring for users who have low speed on the Internet? Or afraid that it will create an increased load on YouTube channels?
As it turned out, there is a trick that allows you to watch videos with a better picture. To do this, add
& fmt = 6 in the address bar.
For comparison, watch the video on this link
http://youtube.com/watch?v=CQzUsTFqtW0 , and then it’s on this:
http://youtube.com/watch?v=CQzUsTFqtW0&fmt=6Here is the difference:

Unfortunately, the trick does not work with all rollers.
You can also add
& fmt = 18 to the end of the address and then, if there is no video in higher quality, it will be shown as usual. You can install the
script for Greasemonkey , which will automatically replace the address.
Translation of
lifehacker.ru