A lot of people do. You can't really find out what's going on in the world from the mainstream media in any real resolution or detail, and "other websites on the internet" don't generally have thousands and thousands of people livestreaming actual live video of what's happening.
Perhaps this could be rectified by our society working to make bandwidth an order of magnitude or two cheaper, so that there can be lots more live video hosts. As it stands, you're pretty much stuck with a few giant megacorps like Google or Twitch.
Meanwhile there are tons of crazy extremists streaming. A lot of it doesnt provide an accurate view and might only be useful as a potentially biased first hand account to digged through by journalists and historians after the fact
Regardless of whether you listen to the streamers, it's an amazing tool for seeing what is actually happening in a specific place. You can ignore the commentary or ideology (not that that is really an issue, most streams are just normies) and see what is happening.
Western mainstream media is a lot of things, but comprehensive and nuanced it is not.
That's pretty hyperbolic.