It seems to be such a popular application, but it gives out such silly errors, it's strange to be honest. I actually stopped using it to download video and do it with the help of this site https://qload.info If you copy the link correctly, it will be done in a couple of mouse clicks. In this case, the video quality is not spoiled and there are no annoying watermarks.
Long press on the video until a popup menu appears. Click on the area where there are no buttons, text, or hashtags. In the screenshot, I have highlighted it with a red rectangle. In the window that appears, click "Save Video. At the bottom of the screen, you will see a line showing the upload process. When it reaches 100% and disappears, the video will already be in your smartphone's gallery. You can trim and merge all your downloaded videos and merge thanks to this article https://www.joincombo.com. This will help save memory on your smartphone.
