This video is terrible!
DON'T pry your battery loose!
Replaced it like it said in the video and I ruined my iPhone completely.
Reassembled it and was stuck in an infinite recovery loop.
Seemed that I broke this 3 miniscule chips under a ribbon due to prying the battery loose.
Just use the plastic lip to pull the battery!
Thank you very much ifixit!!! iPhone is worthless now!