Focus on finding roughly what region this person lives in. Don't assume it's a woman without hard proof, the account could be using some random girls picture and you don't want to get anyone in trouble who's innocent. You don't need to have a complete address or anything, but once you know the general area she's in you will know who to contact.
Once you find out roughly where the person is located, send all of the information you have to as many local animal rescue organizations as you can. They will be the ones who will know how to remove any animals from her, prevent her from getting more animals and which authorities to contact to bring her to justice.
Obviously, the first thing you should do is figure out if she speaks in the videos and if so, what language. Make sure you narrow down the dialect - there's a big difference between Mexican Spanish and Spanish from Spain (not saying she's Spanish but using it as an example).
Beyond looking at distinctive things like cars or houses, pay attention to the grass and trees in the videos. Pay attention to any manufactured objects that appear in the videos. Pay attention to any other sounds you hear - does it sound like a metro area or does it sound like an isolated area? Examine any architecture that appears in the video - what materials are used? If they appear, pay attention to the clothes the person in the video wears. Their shoes are most likely to appear so take note of those. All of these things will give you clues about the general area this might have happened in.
You should copy and save this comment somewhere if you think the information I provided will be helpful later on because I doubt the mods will let it stay up since it's probably too close to doxxing for their comfort. Good luck. I believe in you.