Arc’s mobile browser is here — and it’s not really a web browser at all. It’s a companion app. It’s a sidebar. It’s definitely not trying to replace mobile Safari, at least not yet.

Mobile Browser vs. App: It is important to note that the YouTube mobile app does not support searching for specific videos within a channel. Therefore, ...

Playables can be accessed by heading to the YouTube homepage and selecting "Playables'' from the Explore menu. Players can save their game progress to return to later, and even track high scores.

The Wall Street Journal reports that the “YouTube Playables” setup is in its infancy at the moment, with Google employees only able to play the popular casual game Stack Bounce in the interface.