@YouTube I don´t know why i can´t download a video from my channel. Can you tell me, why?
@YouTubeEspanol No se por que no puedo bajar un video de mi canal. Me pueden decir por qué? 
We'd like to know more. What device are you using? Have you tried using a different device/browser? Are you receiving an error message when downloading the video? Also, you may want to take a look at our Help Center resource for info: https://goo.gl/8Xxqpm . Keep us posted.