- The cell, by David Bolinsky: http://www.ted.com/talks/david_bolinsky_animates_a_cell.html
- The process from conception to birth, by Alexander Tsiaras: http://www.ted.com/talks/lang/en/alexander_tsiaras_conception_to_birth_visualized.html
They both are about ten minutes long, and both are subtitled in Spanish and English... I think they can be really interesting for CLIL biology classes. You've got the written transcription in English too, so they can be analized in an English lesson if desired.