Making process of X4 reflection effect of light and shadow

Step 1: Picture-in-picture is painted on the material covering the track 1. Set the start frame and end frame of the custom filter as shown in the figure.

Part II: Arrangement as shown in the figure, cover rail 2 is the title (drag the title subtitle of the title rail to cover rail 2), cover rail 3 is the material, cover rail 4 is the title, and so on. Paste all the attributes of guardrail 1 on all other materials.

I don't know why the third picture can't be added. Please follow up and supplement it later. sorry )