In my blog post Export Your YouTube Subscriptions to and Excel Spreadsheet, I mentioned converted a spreadsheet to an OPML file to be imported into your RSS client.
The below website will do just that online. Make sure to take a look at the example files for spreadsheet layout required.
If you are more of a do it locally type of person. @pamelafox has made the source code available on her git repository https://github.com/pamelafox/opml-generator
RSS Feeds Categories <- Click here for RSS Feeds and Public OPML link by Categories
Scott Bollinger / kfalconspb / www.bollingerusa.com