[Trisquel-users] Do youtube-dl/HTML5 Video Everywhere run nonfree JS?

[csh]

I looked at the source code to youtube-dl.  youtube.py, the code that handles  
YouTube, calls JSInterpreter on line 1056.  Does this mean that youtube-dl is  
running nonfree JavaScript code from Google on my computer?

Does HTML5 Video Everywhere do the same thing in IceCat?  It seems to work  
when I disable JS.