He's probably the most respected stand-up comedian performing today, but Louis C.K. wasn't always above doing screaming dolphin impressions onstage for a laugh. This video splices footage of a slightly NSFW tribute to George Carlin that Louis gave with footage of his own stand-up, old and new, and paints a picture of how Louis C.K. has grown and changed as an artist over the years.

Today he's regarded as a comedy genius, but this footage shows that it took time and hard work to get to where he is today, both professionally and artistically. Hearing C.K. talk about his struggle with giving up old material to jump into the unknown is actually pretty inspiring.

And, of course, since it's Louis C.K. it's hysterical as well as inspiring. If you have 10 minutes to spare (just think of it like 8 cat videos strewn together), it's definitely worth a watch.