Squid to cache youtube and windows update content

I Have a squid server (transparent) and I want to cahce youtube videos and windows updates. I know that someone has posted a similar question and I have looked at this post but I am configuring this with webmin and would like to know how to set it up so that I can add other dynamic content on other sites.

YouTube has recently added support for caching their videos. This is specific for YouTube (ie. Viddler probably doesn’t work for example), but it should also work with Squid with no extra modification.

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