Unidentified black bird? (sound-file)

Hello!

I’m from northern europe and was taking a walk around a forest and lake, and saw a bunch of these black birds running around or/and flying close to the ground and in the forest. My first guess was that it was a eurasian blackbird, but I was unsure. I used Merlin bird ID and Birdnet, whereas merlin didnt id at all and BIRDnet suggested that it was a Great Tit which cant be right.

Anyone of you know What This bird can be?

Unidentified_blackbird.m4a

Maybe low sound, so that could be why it's an issue in the ID applications.