Seems like an interesting spin on what is basically ’random’. Probably a decent way to get content in front of users that might be outside their normal recommendations.
Is it some essential new feature, no, it’s just a bit of fun to find some new content.
I was feeling optimistic about it because I'm always wanting some way to get more diversity into my recommendations. I was disappointed when it mostly presented the same videos I'd been seeing in my recommendations anyway, just only those with a particular color in the thumbnail.