In a few words, Cobalt is a de-bloated Chromium designed to run YouTube TV. It's smaller and faster than launching it in the platform's browser.
If you have a smart TV/set-top box/streaming stick/etc bought in the past few years, the YouTube app is most likely running inside Cobalt. You can develop HTML5 applications that can run in Cobalt, but it supports only a subset of html/css/js stuff you'd expect from a browser.
If you have a smart TV/set-top box/streaming stick/etc bought in the past few years, the YouTube app is most likely running inside Cobalt. You can develop HTML5 applications that can run in Cobalt, but it supports only a subset of html/css/js stuff you'd expect from a browser.