To publish videos to private domains on JD.com, you can follow these steps:

1. (Log in to JD.com Content Open Platform): First, you need to log in to JD.com Content Open Platform.

2. (Select personal account registration): Select a personal account on the platform to register.

3. (Apply for public domain permissions): Apply for public domain permissions for the [Guang] channel in the Creation Center. This step involves selecting [Guang]-Guang-Video and needs to meet certain conditions, such as uploading a certain number of vertical videos to private domains.

4. (Publish videos to private domains): In the content creation section of the Creation Center, you can start publishing videos to private domains. This includes filling in titles, uploading cover images, uploading video files, etc.

5. (Video requirements): The uploaded video needs to meet specific ratio and size requirements. For example, the ratio of vertical videos should be 9:16 and the size should be at least 720*1280.

6. (Obtain public domain permissions): Once you have obtained public domain permissions, you can start publishing vertical videos.

7. (Video accumulation): It should be noted that if you want to gain traffic, it is not enough to publish one or two videos. The accumulation of videos is very important, and you need to continuously publish high-quality content.

These steps outline the basic process of publishing videos to private domains on JD. Please adjust according to your specific situation and the specific requirements of the platform.