Hm, turns out they removed these last year:

https://variety.com/2025/digital/news/youtube-trending-page-...

Bummer. It used to be at:

https://www.youtube.com/feed/trending

So last year, these were the top videos:

https://web.archive.org/web/20250324155132/https://www.youtu...

There's this, but it's nowhere near as good as seeing the actual videos:

https://trends.google.com/trends/explore?gprop=youtube