07-03-2018 11:45 AM
May I know the complete specs of your PC?
Can you provide the Operating System and Graphics Card details please?
This normally happens if the system doesn't meet the system requirements.
But if your system meets the system requirements we can try to check that.
07-03-2018 03:27 PM
It looks like you're computer is having a hard time processing the video and the app.
What is the exact resolution of the video?
For your system it would be best if you'll use 1080 or 720.
Let me know if that will help.
If not please get back to us or contact GoPro Customer Support.