cross-posted: Did you try using savefrom.net? You can type "https://www.youtube.com/watch?v=IkYVmtgxebU" into the text box and hit "Download". Then you'll get a new tab that tries to get you to install malware. If you decline to install it, the new tab takes you to the malware's homepage. If you close the tab and go back to the original tab, savefrom.net presents you with an error message saying "The download link not found." and does not help you download the video.
