At the moment I'm using this regex to extract the video id from a Youtube URL:

```
url.match(/v=([^&]*)/)[1]

```

How can I alter this so that it will also get the video id from this Youtube URL, which has no v parameter:

```
http://www.youtube.com/user/SHAYTARDS#p/u/9/Xc81AajGUMU

```

Thanks for reading.

EDIT: I'm using ruby 1.8.7