Crashes galore :/

Im giving it 3 stars only because the app in theory is amazing and Im having a lot of fun with it. But Im also very frustrated with it because I paid for an app that 7 out of 10 times wont play back the video I recorded. So I shoot this video after experimenting with the special effects and then it loads indefinitely not allowing me to view it. If this issue is resolved I will be more than happy to give the app 5 stars!

Floweon about Luminancer, v4.0.1