Youtube and social media have all sorts of things that are badly misrepresented, especially sensationalized paranoid stories. I wouldn't take social media as evidence of anything.
I know plenty of cyclists. While some have had accidents with cars, some drivers have driven away rather than face the consequences, I've never heard these stories of naked aggression. I've heard of the occasional argument, but often a self-righteous cyclist is involved.
There’s a good reason “I’ve heard” is always discounted in court as hearsay.
I know what I know from first hands experience.
I don’t think that anything I could have possibly done could be self-righteous enough to justify the actions of those involved but that’s just my opinion.
There is a whole industry dedicated to selling cameras and warning radar for cyclists because driver attacks are so common in fact.
Every serious cyclist I know has a few stories. One of mine includes a passenger leaning out of a car trying to put a plastic bag over my head.
Another has a builder stop his van to threaten me with a claw hammer.
These days I have cameras too.