1.Repeating trick
We all have that one song that we just can't hear enough of.If you want to play it in a loop then just add repeater after youtube in the URL.
So, the url will be like youtuberepeater.com
2.Download any video
Just add "pwn" to the URL before "youtube" and you'll be given multiple options for download formats.
So, the url will be like pwnyoutube.com
3.Skip the introduction part
Add "&wadsworth=1" after the URL of the video.(Without quotes)