i saw ufo change color and shape and have 29 seconds on my iphone videos

I was walking to the car with a friend and I looked up for a second and I said look that's a weird airplane bro. I then took out my iPhone and started to recorded what we where looking at in the night sky. I was following it on camera for about 60 second or minute and half then all of a sudden the ufo changed colors four or five times then moved  behind us when I try to follow it with my camera again my iPhone just turned off and I hard a error message from apple i went back inside right away and plugged my phone it took 30 minutes to turn on I did hard reset then it finally turned on and i went to my pictures to find the videos and the 60 second video was only 29 seconds the rest of the videos the first 45 seconds or so was gone only end video was left but the 29 seconds show the ufo and it changing color and form i still have the video on my iphone