Faulting a Lithium Battery PT1

Trying to work out the fault on a Lithium Iron Battery I bought from China on Ali-express. This is part 1 sorry have never taken one of these apart before. Also you tube or the UK gov has stopped me from posting replies on youtube but I can still post a new video.

https://www.aliexpress.com/item/4000280427790.html?spm=a2g0s.9042311.0.0.5ebb4c4dfFqR3b
This vid is ok for kids to watch but not sure why they would :-)

Видео Faulting a Lithium Battery PT1 канала Oddball