The format is correct, i don't need feed of a particular user but require feed in relation to videos uploaded in channels subscribed by that particular username
Mine works, though I don't have the "?alt=rss" bit, so I'm getting an atom feed instead of an rss feed. When I visit the feed url in a web browser, I see the appropriate xml document. What specific URL are you using, and what do you see when you visit it in a browser? Is NewsBlur giving you an error? What does NewsBlur say about the URL when you add it? Assuming you are sumaggarwal on YouTube, I would expect either of these to work:
