These guys are an independedent Canadian rock band. I've tried, but I seriously haven't managed to find a hint of irony yet in this video. In the song, as well, I've listened a bunch of times, and I haven't found any irony in there, either -- just a song about being joyful (the song's titled "Be Joyful")
If it's true, well, I can't think of a time I've seen a video match a song more perfectly.
And it makes me happy. It's like they were actually listening to the song when they planned the video, and made a list of all the cool stuff that makes people happy and put it in a video together. With puppets!