I'm not sure if it was a movie or a series as we only got 1 VHS tape.
What I remember is that the show used what I think were puppet trolls who ran a radio station out from a tree(s). I also remember they did covers of well-known songs. Problem is I don't known any of their names but I have heard them in time. I remember who I think is the leader always wearing sunglasses because he showed up a lot of the time.