In the past I've subscribed using RSS to a lot of favorite YouTube channels. For example, channels following this format all have RSS feed information attached to them: http://www.youtube.com/user/hickok45/
However, more recently, I've been finding some channels with a different URL format, and those don't seem to have RSS information associated with them. For example, https://www.youtube.com/channel/UCdoRMzGcCBpjKTClFHGI-Yg
Does anyone know if there is any way to either convert the new format to the old format (I've tried a few things but none worked), or to get an RSS feed for all uploads for the new channel format?