I would love a Chromecast App with an optimized smart TV UI. xHamster is the only free site that offers 4k content. Its a shame i cant take advantage of that on the big screen. (And i cant even cast it from my iphone)
Im really close to buying the premium membership to Adult Time, simply because they offer a chromecast app with a simple, yet beautiful design.
If an own standalone app is simply to expensive in development, maybe consider creating an add-on for stremio, which already has a chromecast app. Either way im willing to spend money on it.