You can record a video when you are in Tik Tok. You shouldn't have found the right way. Please follow in my footsteps:

My Tik Tok version: 24.0.0.

Step 1: Open the video you want to report in Tik Tok, and then click the position indicated by the arrow in the figure below.

Step 2: Select "Report" in the pop-up menu bar.

Step 3: Select the type of violation you reported, and then click Next.

The fourth step, fill in the specific illegal content, the more detailed the better, with screenshots. After completing the form, click Submit to enter the manual background audit.