I changed to a new video editing software (PR), my first time to use it, not very skilled yet. But the frame rate of the finished edited video did not drop, still 60FPS. much better than the software I was using before.
The color and lighting of the edited video, however, became a bit strange.
2K:https://mega.nz/file/0IkAwBhC#yGalYWewqN7DNlDDlhP9suBFMwBdjH2ahO02kC6WU54