Flow's take on the DBZ opening theme song -music video

I was on Youtube hoping to listen to this Japanese band's song called "Days". An opening song from Eureka Seven when I saw  one of the related videos was "Cha-La Head-Cha-La" .The first opening song to Dragon Ball Z.

It's good and definitely sounds a lot cleaner than listening to the original 1989 version!

An old Barenaked Ladies music video is linked to Digimon?

So I was hopping around Youtube listening to a selection of my favorite songs from the 1990s and I got to "One Week" via the official Warner Bros. records channel. For some reason  the track artwork for the "buy this" song  section has a (small) image of the Digimon Anime.

The song itself has mentions of Sailor Moon, but not Digimon. Some other Japanese related things like Sushi, and film director Akira Kurosawa. I never really watched Digimon/ Digital Monsters growing up. So was this song played during the series?  You can watch the music video on Youtube