Mate this gave me absolute chills reading it. Three nights in a row is not a coincidence, that's a pattern and patterns mean something is trying to get your attention.
The shadow figure stuff is what got me into all this years ago actually. There's something about the way they move that doesn't match any normal shadow behaviour, like they linger when they shouldn't and sometimes seem to react to you noticing them. Which is the creepy part isn't it.
Really glad you got it on camera because that's the thing people always say - where's the proof. Now you have it. Can you share the footage or even a still from it? Would love to see what the shape looks like, whether its humanoid or more of a formless mass. Some researchers reckon shadow figures are interdimensional beings just passing through our space, others think they're something more attached to a specific location or person.
Has anything unusual happened in your house before these sightings started? Sometimes there's a trigger event people dont even realise is connected.