Leonid Shevtsov shares a script that runs through the developer console that converts your YouTube scriptions into an OPML file. While I don't make a habbit of copying code straight into the developer console, it's short enough to verify everything looks good before proceeding. I discovered this through Giles Turnbull.
I built a similar tool that's able to give you RSS feeds from a channel, video, or as I recently found out playlists.
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