У вашего броузера проблема в совместимости с HTML5
Update 6/29/19: It's been quite a while since I've used these so don't be too surprised if they don't work anymore...
Splatoon - 0:27
Mario Kart 8 - 2:55
Super Mario 3D World - 5:07
TLoZ: Twilight Princess HD - 6:50
[JGecko U codes] (Put the .xml files in the "codes" folder or just read the .xml file using any text editor and enter them manually)
Splatoon:
https://drive.google.com/drive/folders/1WVDmbeW8iUAV8y3L0AB0rO2MI2wELhg8
Mario Kart 8:
https://drive.google.com/drive/folders/10u481hVQN4MSy6NqstUvKwBGO5oAxk06
Super Mario 3D World:
https://drive.google.com/drive/folders/1Go9qIYIJ1qcMkdTRKquxTZPKvDToOiPr
Twilight Princess HD:
https://drive.google.com/drive/folders/1dvU-iWYWWi1DeXGNTUWLlPkyKFFIhUaL
(If you are having trouble running these codes...)
1. Make sure you have CosmoCortney's code handler (https://drive.google.com/drive/folders/12lLmLHsJdDe8_Uk2_B9d7kfJwflDs4FN) in the TCP Gecko app folder on your SD Card
2. Re-download all your files to be sure nothing is wrong with them
3. Check if your computer is blocking anything and stuff like that
4. Find your Wii U's IP address and enter it manually into JGecko U
5. Make sure you have some knowledge on what your doing :/