Thanks for the excellent piece of work. It's the only one I've found which consistently works, in spite of whatever google is doing to make downloading difficult.
When I use this in Firefox, I always save a copy of the download log Firefox provides, for future cross-reference. In Chrome, the download log seems to be designed to make it difficult to copy/save or use outside of Chrome. When I saved it as a complete html page, then tried to view the page externally in Firefox, it was empty. Using View Page Source, I could see there was text in there, but some how invisible -- who knows. And, it didn't contain any detail as far as the actual download references, such as are found in the firefox saved log. Might be useful to allow saving a detailed log external to Chrome.
Thanks for this add-on.
Ted in Portland
Sample of FFOX download log entries:
https://r5---sn-a5m7lnlz.googlevideo.com/videoplayback?ip=18.104.22.168&expire=1463886048&pl=17&upn=9T3TlH9mKPo&signature=673EB69C12944CC66BA46E4AA92ED6018002C81A.14F20A1419423BB0A4C60C710943919EA1CF3F6A&id=o-AJA1g2EWvoYCl5NjvPSzsnvFKraDZzvlcw44bVOsxH4U&mime=video/mp4&key=cms1&sver=3&ratebypass=yes&dur=140.968&itag=18&fexp=9412859,9416126,9416891,9422596,9427484,9428398,9431012,9431718,9432373,9432423,9432934,9433096,9433946,9433963,9434955,9435264,9435400,9435876,9435979,9436508,9437396&sparams=dur,expire,id,initcwndbps,ip,ipbits,itag,lmt,mime,mm,mn,ms,mv,nh,pl,ratebypass,requiressl,source,upn&lmt=1458876485264665&ipbits=0&source=youtube&requiressl=yes&title=Sister Teen murder victim ‘loved deeper than anyone’&redirect_counter=1&req_id=c57a45477b0aa3ee&cms_redirect=yes&mm=34&mn=sn-a5m7lnlz&ms=ltu&mt=1463864434&mv=m&nh=IgpwcjAxLmxheDE2KgkxMjcuMC4wLjE