Oh great! I'm excited to watch the documentary.
Yes Dark Star is very low budget, and can be tedious at times. But it does contain a fair amount of pathos. Pinback's video diary is really effective and you really start to feel sympathy for these astronauts who have been away far far too long, only to be faced with one of their own planet destroying intelligent bombs that has no intention of listening to their pleas not to detonate prematurely. Despite it's amateurish production (as evidenced by the beachball alien you've pictured)., it's a good story.