Long ago I spent something like 5 BTC buying a Nikon D750, which I think was more expensive in total than getting the camera you got. And I ended up doing a lot of low light photography wishing I'd gotten the Sony :P Those A7S cameras are awesome.

For the UFO, were you seeing it with your eyes before you recorded this? To me it looks like it could be a flying insect or just some plant dust, being illuminated by the moon's backlighting. UFO or not it's intriguing! I hope you keep going out and get some great footage of a UFO that lacks another explanation.