No spoilers below:

The movie was great but it's not a stand-alone movie, it is a small piece of the full story so don't go in thinking that everything will be explained and tied up in a neat little bow.

The movie takes place in Kane Pixel (the movie director's) youtube series: https://www.youtube.com/playlist?list=PLVAh-MgDVqvDUEq6qDXqO...

It makes a lot more sense if you watch the full youtube series first.

I am aware of the existence of the web series but have never seen any of it, and I felt it was a great standalone experience. The lack of explanation I think worked really well.