How do i put a tag on a video like subscribe?

[Greth]

When those pro bitchs out there they make videos and at the end of the video it shows subscribe and twitter when i click it i sub how do i do that to my fucken videos

[Zachary]

Use annotation links. To make the link for subscribing, do http://www.youtube.com/subscription_center?add_user=[INSERT YOUR USERNAME HERE]
You can add pictures at the end and put annotations OVER them.
Also, it's a good idea to watch your language, if you want more people to answer.

[☢ ASOT600 ☢]

You have to do that in your video editing program. Just add some text saying subscribe, possibly some text for a playlist and some logos for your social networking sites. At this point these icons won't actually be clickable. Once you've uploaded the video, just add annotations over the video.