VID-1332 adding languages to the i18n file for the VideosModule

Just copied and pasted from the ticket.  

It's weird that when I try ?uselang=jp and ?uselang=xh the i18n messages still show up in english, but when I use 'de' and 'es' the messages are translated. Not sure what's going on there, but I don't think it has to do with this ticket.