This isn’t a video, but I hope it will help.
So first, surf to the games gallery. This is where you can pick your games that you want to play!
Second, hover over the game of your choice with your mouse. Press the button that says “download”. It’ll take you to a page where you can download the files. Make sure to get the .HEX file, and, if there is one, the .INF file.
Next, plug your MAKERbuino SD card into your computer. Drag the .HEX file and the .INF file onto the SD card, and verify that it has transferred onto the SD card. Eject your card, and plug it into your MAKERbuino! That’s it!