2. Look for options or buttons to upload videos, which can usually be found at the bottom of the complaint page or in the related complaint form.

3. Click the option or button to upload the video.

4. In the pop-up file selection window, browse the video files on your computer or mobile device.

5. Select the video file to upload, and then click OK or Open.

6. Wait for the video to upload, which may take some time, depending on your video file size and network speed.

7. After filling in the relevant information, click the Submit or Confirm button to submit your complaint together with the video file to the 3 15 complaint platform.