Not sure what I shorted when replacing the battery

Howdy. Not my first time replacing an iphone battery but definitely the first time to have this issue.

Replaced my phone's battery following this video and after turning the phone on I noticed a spark and some smoke coming from the top screen ribbon connector. The screen displayed the flashing signal to charge battery and the top connector popped off. once the screen stopped flashing i unplugged all the connectors and tried again. phone turned on without issue but I noted smoking and excessive heat at both of the screen ribbon connectors. screen worked fine, scrolled and touched well. removed the screen and unplugged the battery.

I do not know what type of damage I have done to my phone and wanted to know if anyone could possibly provide some insight. I thought the connectors were fully plugged into the device when attempting to power it on but I am guessing they weren't. Before you ask: yes, the battery was plugged in, I followed the video and realize now that I should not have done that.

any advice/pointers/ideas? I am looking for a repair shop right now but worry that i fried/shorted something tiny that would require mirco soldering.