TLDR: Solid idea and (mostly) solid execution. I think this idea has the potential to be turned into an episodic series if fleshed out more and some minor issues fixed. It would be cool to play through the first incident PieJaw captured for example and maybe learn if it was real or just a hoax.
I know this game is in active development so I'll offer what feedback I can here.
Visual
In relation to art style I don't have too many issues, but I do think the game could work with a few extra visual elements. Subtle things like some camera shake and a tiny bit of chromatic aberration and grain to simulate the lens. As no handheld camera is ever that smooth and not many cameras are crystal clear in the dark like that. Have some defocus during the hectic parts of quick movements too maybe. It may clash with the art style but I won't know for certain without seeing it but that's what I think could add to it. I know those things do irk some people so if those do get added, maybe make them optional.
Audio
The main thing that I think needs to be built on is the sound, most notably the voices, or lack there of. Since there's so much going on at once, I found it near impossible to focus on subtitles, typing, chat, face cam, etc; It was just too much at once for the most part. I think some form of voice would help me focus on the other elements. It'll also just add so much more to have more sound going, especially at the end when stuff starts going a bit nuts.
This one is a bit of a random idea but if you want to add randomness to each playthrough, maybe have a catalogue of sound effects that the 'chat' could play at random during the more quiet parts; Think how some streamers have it set up in real life to make extra money. Make this truly random and maybe even include easter eggs if someone uses a certain name. Imagine someone using Markiplier as a name then hearing "Freddy you bitch" for example.