Download YouTube videos. Video formats are listed at the top of the watch page. Video links are tagged so that they can be downloaded easily.
Left-click only copies the title to the clipboard.
You need to right-click and choose 'save-as'. The copied title will come in useful here as you can paste it in the filename dialog box.
It works this way due to limitations imposed by YouTube.
点击毫无反应呢
https://www.youtube.com/watch?v=XgZaFn3TqUE&pbjreload=10