Microsoft Edge Game Assist hits Stable release so you can now use it to pin videos in-game without setting it as your default browser
Once you do this, you'll be able to use Game Assist while gaming by hitting Win+G to open your Game Bar. If you're in a supported game—which now includes a handful of new titles such as Marvel Rivals and Dragon Age: The Veilguard—it should attempt to grab you relevant info or guides for whatever you're playing.