On Firefox you can block short form content from YouTube as easily as adding one extension or a few uBlock Origin filter lines. With a bit more work it's possible to fix a lot of other stuff using various browser extensions and userscripts on desktop/laptop. On mobile (Android) I use an app that patches the YT executable called "Revanced Extended" (https://github.com/inotia00/ReVanced_Extended). On set top (Android TV sticks) I use an app called SmartTube (https://smarttubeapp.github.io/).

On desktop/laptop I decided to go deeper into YT customization. My current mod stack for YT completely re-imagines the YT interface to be focused and space efficient, replaces spammy, inaccurate thumbnails with actual video stills, re-formats spammy ALL CAPS AtTentIoN SeEKiNG headlines, shows enough of the expanded description to be useful and outright blocks a bunch of stuff I never want to see (channel promos, upcoming, shorts, live streams, algorithm recommendations, etc). It takes me straight to a grid of only new videos posted by the niche channels I subscribe to, so I never even see the Youtube home page.

Warning: I cobbled together this stack over time out of disparate unrelated components by just experimenting until I found a combination which "fixes" YT in exactly the ways I want. Even though it heavily customizes YT, it's all been working great with no changes for over two years - but YT could break it any time. If you're okay with that, this should get you started:

1. A UserScript YouTube 'mod platform' called [Nova YouTube](https://github.com/raingart/Nova-YouTube-extension). This does the thumbnail, description and other reformatting as well as most of the content blocking by type (with a couple uBO filters found in the uBO subreddit).

2. A Stylus userstyles (CSS) mod called [AdashimaaTube](https://github.com/sapondanaisriwan/AdashimaaTube). This mostly handles reformatting the interface like number of rows and columns in grids and selectively removing YT's dark-pattern UI cruft.

3. "Youtube Enhancer" (https://addons.mozilla.org/en-US/firefox/addon/youtube-enhan...) is a Firefox add-on which I mostly use for one feature it does perfectly (auto-expanding videos to fill the browser viewport but not in 'full-screen'). I also like the way Enhanced YouTube's configurable player interface buttons work and look.

My YT account was created in 2008 and until I did this I didn't even realize just how awful YT had become because it was done so gradually over the years. There are a lot of different add-ons and userscripts out there and the ones I happened to land on may not suit you, so just try different options to see what's possible and then experiment until you find a stack which works for you.