1. Add gif before YouTube.

Example : http://gif.gifyoutube.com/watch?v=Video ID

1. Open YouTube Channel.
2. Remove All the things after ?.
3. Add sub_confirmation=1 after ?.

https://img.youtube.com/vi/VideoID/0.jpg

1. CONV. - Add conv before youtube.
2. Deturl - Add pwn before youtube.
3. savefrom.net - Add ss before youtube.
4. Save-Video - Add magic between you & tube.
5. SaveMedia - Add kick before youtube.
6. x2convert - Add x2 after youtube.
7. y2mate - Add pp after youtube.
8. y2mate.is - Add pi after youtube.
9. Yout - Delete youtube's ube.
10. YouTube Multi Downloader Online - Add 1s after youtube.
11. YouTube Powerful Converter - ytmp3eu.eu.
12. YouTubeDLD - Add dld after youtube.
13. YT5s - Add 5s after youtube.

Delete ube of URL.

https://www.youtube.com/oembed?url=Video URL&format=json

Add &t=XmXXs or &t=XXs after YouTube Video ID. (m = minute, s = second)

1. YouTube Doubler

Add &start=XX after YouTube ID. (only write down the total of seconds without units.)

Add nsfw before youtube.

Add repeat or repeater after youtube.

1. ProxTube