I love IHE and all his videos, and I actually encountered the Damn Daniel meme in my car. I was driving around some 18 year old college girls. (No, I am not a player, just a gloried rideshare guy) and they kept playing the Damn Daniel video on their phone.
I didn't get why it was funny, and I like strange and awkward humor. I still watch Yee videos, but the Damn Daniel just confuses me. We'll get t-shirt and other BS due to this silly meme.
These guys showed up on Ellen. Really?
So, yeah, he made a parody of the DD meme and now that parody has created its own meme. Anyway, Durr Plant has become a meme in its own right. Heck it has its own entry on Know Your Meme.