Very simple: find the ted video you want to download and copy the full URL from the address bar at the top of your browser window
To open the website that parses the video online, just enter it in the address bar at the top of the browser window.superparse.com
Paste the URL you just copied in the input box, click the search button on the right, or press the Enter key directly。
Waiting for the parsing to complete, there will be a lot of videos in various formats and definitions, choose
one you want a click
Then you will jump to a new page containing the video, don't panic, press the right mouse button and
save video as
Then choose a location you want to save on your computer and the whole process is complete.