I didn't actually find it funny. On the other hand, if you don't focus on his goofy presentation you might find that the content is really good.
Gotta love the internet, filled with wonders like this... ;)
When you're knowledgeable and your content is quality, I don't understand why you'd need to dress like a cat during the videos. Is it a gimmick for attention? If so, is the assumption that those interested in DNS somehow intersect with those that enjoy seeing 30+ year old men dress up like a cat? Maybe I'm overthinking this - the guy does seem to have quite a few views, so apparently it's working for him.