a) Works produced two years prior to the date of this call may participate
b) Duration: Up to 15 minutes
c) If the videos are in a foreign language must provide a version with subtitles in English or Spanish depending on the country of origin; on the contrary, if the videos are in Spanish (preferably) must submit a version with English subtitles.
This is just an excerpt of the regulations, carefully read the complete regulations before submitting.
Actividad subvencionada por el Ministerio de Educación, Cultura y Deporte