Nintendo apparently has updated YouTube to make it no longer usable as an exploit, while at the same time leaving the app the same otherwise useless crap.
http://nintendoeverything.com/youtube-3ds-app-updated/
Smealum confirms updates being forced, TubeHax for the time being is gone: https://twitter.com/smealum/status/654705697880281089
http://nintendoeverything.com/youtube-3ds-app-updated/
Smealum confirms updates being forced, TubeHax for the time being is gone: https://twitter.com/smealum/status/654705697880281089