Hey everyone I have a 3DS setup to use a mt-card and everywhere I look people are saying YouTube doesn't work on emunand but I reasently downloaded it and it works for me on emunand and on 4.1.0E Is it just the US version that uses the latest keys?

Hold the L button as you boot into Gateway Mode. One of the options on the right will be 'Format emuNAND'. This will format your SD card and partition it, so you have one partition dedicated solely to emulating the latest firmware.
Once you have it installed (takes 5-10 minutes), then the next time you boot into Gateway Mode, you can go to Settings and perform a System Update, after verifying that the letters GW appear before the firmware version.
Then you will be able to emulate the latest firmware and be able to access DLC and the eShop, while keeping your console on a lower firmware that Gateway can run on.
DO NOT EVER RUN DIAGNOSTICS MODE. If you do, you will drastically increase your chances of getting a brick. NEVER EVER EVER RUN DIAGNOSTICS.
