WARNING: [youtube] Falling back to generic n function search
         player = https://www.youtube.com/s/player/03dbdfab/player_ias.vflset/en_US/base.js
WARNING: [youtube] Sfn-BD4_jL4: nsig extraction failed: Some formats may be missing
         n = dNOqtnT6p6wdd2ZA5 ; player = https://www.youtube.com/s/player/03dbdfab/player_ias.vflset/en_US/base.js
WARNING: [youtube] Falling back to generic n function search
         player = https://www.youtube.com/s/player/03dbdfab/player_ias.vflset/en_US/base.js
WARNING: [youtube] Sfn-BD4_jL4: nsig extraction failed: Some formats may be missing
         n = HvGt5OSmIi7zIKQxO ; player = https://www.youtube.com/s/player/03dbdfab/player_ias.vflset/en_US/base.js