Depends on how you consider several subjective factors, including political, economical, technological and ownership/control.

Closest to lemmy might be TILvids (Today I Learned videos) → https://tilvids.com

They use Peertube protocol (FOSS), are sustained by donations (patreon), and there is a few big FOSS influencers there already, like the french developer from The Linux Experiment.

There is a few corporations that are pretty much national versions of youtube, like Nikoniko (Japan), Rutube (Russia), VK (Russia), Bilibili (China), Aparat (Iran) etc that would be nice if they were competitors cause they already have all the infrastructure in place to receive everything in youtube in one swop if we neeeded, but alas they obviously will not be taken. (sorry nikoniko)

There is some minor corporations like Odysee, Rumble, Dailymotion, Vimeo. But they are still private profit-driven corporations, so they can go the youtube way eventually. There is some rumours that Tiktok might launch a separate app and site for youtube-style videos too, but again, it is another private corporation and controversial.

The scale of capital needed for video hosting is several orders of magnitude bigger than text and images, this is why youtube became a de facto monopoly on most parts of the world. There is several text-driven social media sites, including this one, but only one big youtube.