Video searches are just as prone to spam, clickbait and algorithm manipulation as regular web searches.
I believe that much of such bad behavior can be filtered by blocking or demoting YouTube channels.
Therefore, it would be nice to apply ranking adjustments to entire channels on kagi.com/videos
For instance, the globe-icon could be placed in the lower right corner of each video.
Perhaps, similar non-domain-based rankings could even be expanded to more websites: Demote Subreddits, Tumblr Accounts etc...