This video works at high quality and when loading does not show high quality

This video works at high quality and when loading does not show high quality

But the download from the button low quality

Browser: Chrome 77.0.3865 Windows
User Agent: Mozilla/5.0 (Windows NT 6.1; Win64; x64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/77.0.3865.90 Safari/537.36
Extension: userjs-chrome 8.48.2