1 Link to a Specific Playback Point
Sometimes, when clicking on a link to a YouTube video, you're fast-forwarded to a specific point in the video. This is usually the case when the person who linked to the video intended for the viewer to watch that clip, without having to watch the rest of the video. If you want to do the same, here's how:-
Add #t= to the end of the video URL, followed by the minute you want (with an m) and then the second (with an s). An example would be #t=01m18s or#t=78s for 1:18 in the video.
You can also just pause the video at the desired point, right-click on the video, and choose copy video URL at current time.
This also works for embedding videos, so if you're posting it on your own blog or website, you can also cut out an extra step by embedding the video rather than linking to it.
2 Customize the Ads You See
The peskiest part of YouTube are the ads. They pop up everywhere and always make you wait up to 30 seconds, just to watch a 5 second video of someone falling down on their ass. While you can't get rid of the ads, you can surely customize them.
All you need to do is head over to Ad Preferences and remove whichever ads you don't want to appear. Not sure what advantages this has, but at least I don't have to watch those damn ads about how to treat erectile dysfunction anymore.
3 Repeat All or Part of a Video
We all have that one song that we just can't hear enough of. If you need to playback a video automatically, you can add the word "repeater" after "youtube" in the URL to open it in an external site that will play it back as often as you let it. You can also set it to play back just part of the video. So:-
4 Download Any Video
As any video production student knows, there are plenty of reasons to download a video that don't involve copyright infringement for fun and profit. If you want to get a local copy of a YouTube video, pwnyoutube.com can help. Just add "pwn" to the URL before "youtube" and you'll be taken to an external site with multiple options for download formats. With this, the following URL:P
Would now be:-
5 Bypass Regional Restrictions
Licensing for videos is complicated enough already. If you're looking to get to a video that has some form of restriction on it, change the format of the video link from this:-
The downside is the video will play filling the entire window. The upside is it will play.
Some May Work. Thanks to : Wonderhowto