The possibilities are endless. You can build a site that lets any user create their own personalized tv with content from any streaming provider that has an api. This can be done in a few hours literally. And you don't even have to host them since it's all client side javascript. Honestly if I weren't so busy with my own project I would consider contacting OP to see what we could do with this.

That would be an amazing addition!

Well, this website is completely cloneable, the JS is non-minified, so adding in community lists is certainly possible. Maybe just a tool to create those lists collaboratively. Good idea!