I want to rate this a 10. The acting, the CGI... perfect, just perfect. I even loved the battle droid's voice - very human and as a result, conveyed the kind of pain and raw emotions it(?) was dealing with.
The issue: it turned into a tease. It's a 5 minute short and while it conveyed a tremendous amount of information, in the end, the video wasn't meant for us. It was meant to impress the writer/director's future employers.
It left us hanging when an extra minute or two could have made a great (self-enclosed) short story (and still impressed future employers). It's not unlike a TV series that isn't sure it's going to get renewed.
They end the season on a major cliffhanger (screwing over their most loyal fans - on purpose). The purpose of which is to manipulate the viewers to fight for them - when simply writing a great series ending would have achieved even better results (and long-term good will).
Video = 10 rating. Feeling used and manipulated = 1. Overall = 6 rating.