Check out the new video by "some more news", it's more comedy than anything, by it deals with some reputable sources.
https://youtu.be/5aFQY6-Mxcw?si=IFkuuPCQ6Pmv7YOK
The effect is not clear cut, and there are many other confounding effects that might be more important, and being glued to your phone might be a symptom more than a cause, but I agree that excessive social media and short format videos are bad for you, but that can be said about video games or even regular games.
Stremio + Real debrid.
Stremio is a platform to watch any media you like (works very similar to Plex), you can use it as it is, and install the plugins that are more useful to you (torrentio for example). If your country has strict laws, then you can use real debrid to convert the torrents to direct downloads, you just need to open an account in real debrid, pay a few dollars a month (no need to pay for a VPN as direct downloads are ok), and link your account to stremio, and then you'll have access to lots of content.
But I only use it to watch the latest linux distributions, nothing like spending a Sunday afternoon watching Fedora 40 while it's raining outside.