I also noticed that she still has a video of us together on her account. Am I reading into this too much or could she be baiting a reaction out of me, or even planning to reach out eventually? I feel like i've been driving myself crazy wondering about this and would appreciate you guys' opinions.
at the end of the day, you know her better than we do.
your hunch may be emotionally driven, and lord knows i read far too much into what my ex was posting back in the day, but i think more important than what you read into it is how you react, or not to it.
people block others when they feel the need to send a message, and/or erect very high walls. when they unblock, if they do, its because they no longer feel the need for those walls.
i think that it would be a classic mistake to read into it that she is inviting you to contact her, even if she were. people do this, frequently, and then when the unblocked party reaches out, they block them again.
so what i think you can reliably take from it, is that she doesnt feel the need to keep you blocked on this medium. it need not be more, or less than that.