WARNING: [youtube] Falling back to generic n function search
         player = https://www.youtube.com/s/player/e7567ecf/player_ias.vflset/en_US/base.js
WARNING: [youtube] G--Vb80efp0: nsig extraction failed: Some formats may be missing
         n = PKwkyOoT9hEfeL6uK ; player = https://www.youtube.com/s/player/e7567ecf/player_ias.vflset/en_US/base.js
WARNING: [youtube] Falling back to generic n function search
         player = https://www.youtube.com/s/player/e7567ecf/player_ias.vflset/en_US/base.js
WARNING: [youtube] G--Vb80efp0: nsig extraction failed: Some formats may be missing
         n = fDOaqaXj9RXt6VUtV ; player = https://www.youtube.com/s/player/e7567ecf/player_ias.vflset/en_US/base.js
ERROR: [youtube] G--Vb80efp0: Sign in to confirm you’re not a bot. This helps protect our community. Learn more