Hi @saracampero!
Since the overall goal is to reach as many people as possible with the campaign, a video in English may be more suitable in that context. Yet, as mentioned in the post, there are actually no rules. Of course someone doing a video in Spanish wouldn’t be “excluded” from the contest (this is the Blockchain - no censorship at all ;-)), you just may not receive so many votes for it since 70% of the Steem community is English speaking.
What about adding some English subtitles? Could that be a good solution?
Thanks a lot for your interest in the campaign, I’m really happy so many people are considering to participate!! Good luck for your entry though 🙃🤞
Mucha suerte, y comparte el proyecto con tus amigos españoles si quieres. Cuanto más seamos, mejor! :)