Recording TV

Hello, i bought a Win TV USB thing yesterday and have been taking pics and video. the video is MPEG but its too large for example :

30second clip = 9MB

is there any way i could descale that and make it smaller.
If anyone can help i will be greatly thankful

This isn't a Newsroom topic.

sorry , i posted it here aswell incase any one knew, sory

The other version of this topic can now be found in the Requests forum, as I feel it comes under the "Multimedia enquiries" description.
http://www.tvforum.co.uk/forum/viewtopic.php?t=17908