"procedure to download a video file"에 답변Will a screen recorder for Mac be helpful? I think compared with a video downloader that supports URL converting, screen recording is more reliable and powerful. I often use a screen recorder tool to record online movies in 1080p at 60 FPS.
"Video upside down how can I correct it"에 답변You can also import the video to your computer and then use a desktop video cutter to rotate the video screen easily. That’s what I do.
"How to screen record?"에 답변My sis and I use Joyoshare VidiKit (formally known as Joyoshare Screen Recorder). It is able to record screen in 1080p with no watermark. Maybe you could give it a shot.