This is a thing with all of the major social media platforms. It's pretty aggravating in my opinion, especially considering that the "misinformation" label is so vague, and not applied evenly. I also don't think it's the place of these platforms to determine what's "true" and what's not, as that's very subjective, and they likely don't have trained staff who can make that determination.
I stay away from modern-day material from CBS, ANYTHING from legacy Viacom. Individual stations I will not post include KESQ and WMC-TV as they've pulled my stuff before (over a decade ago, but I still have a sour taste in my mouth). I focus on local stations and just avoid national content if I can help it. The local stations usually understand, and appreciate, what we're trying to do as archivists. Or the chain owner's corporate legal team doesn't think it's worth going after an individual for a newscast that aired once. OTOH, the networks have bigger legal teams that have the time to search YouTube looking for content to pull (*cough* Viacom *cough*).