Lol you can have mine if you want. It was pretty good for older PC games that were designed for mouse and keyboard, but it didn’t really work well for more modern titles designed for Xbox or PlayStation controllers. Also, forget about anything fast paced or competitive since missed and keyboard or a conventional controller just blows it out of the water.

Pretty sure Emby is open source since Jellyfin is a fork of it, but that also means you might run into the same issues if you try switching over.

I’d check if you have hardware transcoding turned on. If you have an intel cpu it should be enough to get things to work.