A TV show format fits Minecraft way more than a movie format. There's so many things to do and explore in the game that it can't all be crammed into a two hour long movie.

The potential for a Minecraft TV show is limitless. There could be episodes dedicated to small things, like bees, or Lush Caves, and then there could be arcs spanning several episodes featuring Ancient Cities or Nether Forteresses.

A Minecraft TV show could effectively explore every aspect of Minecraft, whereas a movie has to focus on certain aspects of the game.