another way to get clips or help filter untagged stuff is search for BLANK (the default tag)
one thought about the bruise, it happens on interview 2, about a week after she is first in reporting Simon as missing...
I think one or both of them are formulating a plan to get away with it during that timeframe before the second interview.
If it is split personality, she might have gotten the bruise while moving the body into the cellar, as Eve (as she/they mention in later clips, when talking about the alibi)- possibly even by cleaning, getting the bags from the kitchen or the tape (actually hitting head on cabinet as she said).. if it were by cleaning then I imagine it was "real" Hannah not knowing about the body.
if it is twins or...some other manifestation, it could have been caused by some confrontation between both of them, after Simon is killed- maybe the real Hannah does think Simon is missing and then finds out, lashes out at Eve or threatens... Eve hits her bruising her face.. because Eve doesn't want this "game" of rules to end... (which she later states the most important thing is Hannah, not Simon)
I think that day 2 Hannah is the real hannah, and possibly day 1 is Eve.
Day 3 Hannah is definitely Eve IMO, just by body language compared to day2 Hannah.
I dont know... man lol
*edit*
The other thing too is, maybe Hannah doesn't have split personalities, and she just invents it to try to somehow get out of the situation by confusing the story. It would cover her getting that tattoo and other body language that starts to really show up in day 3 onward. OR maybe it is actually manifesting throughout, from the trauma of whatever did happen with Simon...