Greasy Fork

Recently the scripts seemed to disappear all videos below "Shorts" from main page.

Which browser? And can you confirm you're on the latest version of the script? Also, do you have other YouTube-related extensions that change the layout significantly?

Since the change to utilizing YouTube API introduced in v1.2.0 (due to changes to YouTube's layout, which caused the old method to stop functioning properly), the script will now perform scroll detection to check when videos grids enter your browser's viewport, so that API calls will only be done when necessary.

Assuming nothing breaks, in enabled pages (homepage and watch page), videos grids will indeed be visually transparent upon first loading the page. But as you scroll down, API calls will be done on them to determine their views counts, and they'll gradually appear if their views aren't below the configured thresholds. But this process should typically be done in less than a second.

Firefox with disabled uBlock Origin, no extension to change layout and only this script. The last v1.2.8 scripts still doesn't work.

Strange. I mainly use this on LibreWolf (basically Firefox), and it works just fine even with uBlock Origin + various filters enabled.

Perhaps the userscript manager? For LibreWolf/Firefox specifically, I've only fully tested this on Violentmonkey. Though I've also tested Chrome with Tampermonkey, and have seen no issues.

At best, I can only assume your account is enrolled to an early A/B test by YouTube which changes something under the hood. I can't quite imagine how that could break it completely, however.

I guess you'll have to look at your Browser Console and see if the script is throwing any errors at all.

My userscript manager is Tampermonkey v5.3.3 and installed the script about 2 weeks ago. It worked normally then and seemed to begin breaking the main page from v1.2.7.