Regarding this question, to broadcast live on Nintendo game console on Douyin, you need to prepare the following equipment and software:

1. Nintendo game console (Switch, Wii U, etc.)

2. Game console’s matching controller

3. Game console’s HDMI cable

4. Video capture card (such as Elgato HD60S)

5. Computer or laptop

6. OBS Studio software (free and open source live broadcast software)

7. Douyin mobile client

The following steps are as follows:

1. Connect the game console and video capture card via HDMI cable, and connect the video capture card and computer via USB cable.

2. Install and open OBS Studio software on the computer and set it up. Add "Video Capture Device" in the "Source" window, select the corresponding capture card, and then set the live broadcast platform, image quality, bit rate and other parameters in the "Output" window.

3. Open the Douyin mobile client, click the "+" button in the lower right corner, select the "Live" function, and enter the live broadcast room.

4. Click the "Start Live" button on OBS Studio on the computer to start live broadcasting the game screen.

5. During the live broadcast, you can add music, text, special effects and other elements to the Douyin live broadcast room to interact with the audience.

It should be noted that in the process of live broadcasting Nintendo game consoles, it is necessary to comply with the relevant regulations of the game manufacturer. It is forbidden to live broadcast unauthorized game content to avoid violating relevant laws and regulations.