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
The key allure, though, apart from it attempting to find relevant guides and information for whatever you're playing in select games, is its ability to be pinned on-screen while gaming. Y'know, for all the single-screen peasants (kidding—just a personal jab at my single-screen defenders here in the PC Gamer hardware den).