The lava in the video probably reached down the mountain 3,000 to 4,000 ft down the slope from the crater rim. It looks like it was taken from the highway that goes between Popocatepetl and Ixtachatl.
Glad I’m here and it’s where it is. :^)
http://images.volcanodiscovery.com/uploads/pics/popo-2018-12-16-00-58-30.jpg
https://www.volcanodiscovery.com/typo3temp/pics/d1e3f3cb71.jpg
