I can't talk about specific flight patterns, but flocking defined as flying together in groups is mentioned also. It's clearly seen in the videos.

I know if a flock of seagulls is flying overhead then run like hell :)

Yes indeed. Run, run so far away. Run all night and day. Of course, you won't be able to get away.

Jackdaws do fly in flocks that make a similar pattern in the air. Their numbers are not so great, a hundred or so while starlings may flock by the tens of thousands or even millions. The OP's video was much like other videos of jackdaw flocks in flight.

Ah, the wonders of (sorry i can't remember how you would spell it in English so in German)Schwarmverhalten.
A few months ago i saw a documentation about it.
We see it as a swarm and wonder how someone could orchestrate without crashes.
I can't remember all, only that there is no leader and the individual animal only follows those close to him.

Schwarmverhalten = "flocking behavior"; even there, jackdaws are a little different, because they mate for life and fly in pairs, and if you look closely, you will see not just individual birds, but pairs maneuvering together.

I have a bird house on the windowsill of my living room. It gets visited by pigeons once per day, but since they are so big they have trouble getting to the food. Amazingly, twice now one has shown up with a twig in its beak, which it then used as a tool to scrape up hard to get seeds.

I think that's a fine thing. Was quite surprised to find out that pigeons possess the cognitive ability for something like that.