Window Capture

Window Capture tabs embed a window within OpenKneeboard; this can be used to bring a window into VR:

Google Chrome with Youtube

If you have a graphics tablet, you can use that to interact with the captured window while in game.

If this is all you use OpenKneeboard for, you might want to hide OpenKneeboard’s header and footer.

If you encounter problems, check the troubleshooting guide; if there steps there don’t resolve your problems, check out Getting Help.