Generating RSS feed on the fly, from a list of links?

How might one dynamically generate a temporary RSS feed, on the fly, from a list of links that point to video开发者_StackOverflows, for example?

Check the specifications for RSS-feeds, e.g. here:

http://www.rss-specifications.com/ or http://www.atomenabled.org/developers/syndication/atom-format-spec.php, there's tons, just check Google.

Then iterate through your list and build the appropriate XML.