WARNING: [youtube] AAWSawGr0dk: nsig extraction failed: Some formats may be missing
         n = EBgHyvCc--KbPrBn ; player = https://www.youtube.com/s/player/a87a9450/player_ias.vflset/en_US/base.js
WARNING: [youtube] AAWSawGr0dk: nsig extraction failed: Some formats may be missing
         n = xG0L57AXXCjwImzI ; player = https://www.youtube.com/s/player/a87a9450/player_ias.vflset/en_US/base.js