YouTube Playlist – Get RSS Feed

There is no publicly available RSS feed. Tweetdeck uses the Graph API to gather all photos from the user and updates the client based on new one received which aren't already in their database.

There IS a nice solution for Facebook Groups implemented using Yahoo Pipes (which seems to be old and no longer works). Possibly it can be modified to work with users. http://pipes.yahoo.com/pipes/pipe.info?_id=055b7fbcb01605dbd34e5287b8eee8cd

I could see a couple of options to accomplish this:

1. You could use Yahoo Pipes to quickly and easily generate a new feed with the combination of the 2 feeds you have already found. No code to write, easy to get started.
2. You could write the code to combine the feeds manually as you suggested. Depending on how you plan to display or use the combined feed, you will want to take care in sorting to interleave the 2 feeds based on dates.
3. You could use the YouTube Data API to request the activity feed for the user. This isn't as easy to try in a browser or RSS reader because you need to have, use, and send a developer key as part of the HTTP request headers in order to get results. Then you will want to filter out activity feed items that are not of interest to you - e.g. when a user subscribes to a channel, comments on a video, etc. According to your question you will just want to grab any entry elements where the category term is marked with 'video_uploaded' or 'video_favorited'. Here is the link to the documentation on using the YouTube activity feeds through the YouTube data APIs: Documentation on YouTube activity feeds