Hi! As a native Spanish speaker, currently living in an English-speaking country, and with experience in writing and translation between the two languages, I can do this job quickly and flawlessly. You won't be disappointed.
As 45 minutes of video would take several hours to subtitle, I've guessed 15 hours of work per week. That would be about one video per day, five per week, supposing that each one would take three hours of work.
Thanks for the opportunity to apply.