We expect a fix for this issue Thursday, February 11th.
We are aware of an issue where videos compile but do not playback or save to Photos and can cause the app to become unresponsive.
This appears to only affect videos shot when you have toggled the camera from front to back or vice versa.
If sharing to AuditionDrop these files will not play properly in browsers other than Safari.
Please upload to the latest version of Slatable.