the new option (about 1080p downlaod ) it covers the numbre of views & it makes me nervous :3

Hello, due to the change in Mozilla browser, we are no longer able to convert videos in mp3 and merge video and audio flows in mp4.
New API doesn't support functions allowing us to launch video converter and to integrate it with browser.

You can install Ummy Video Downloader to download mp3 and 1080p from Youtube: https://videodownloader.ummy.net