Use the TikTok Drafts tool to edit the cover and add music, as described in this tutorial.
Option 1: Nostalgic/Memory (Good for personal/throwback content) VID-20210407-WA0303.mp4
Since I cannot view the contents of the file VID-20210407-WA0303.mp4 , I have prepared a few versatile post templates based on common video content types. Choose the one that best fits your video: Use the TikTok Drafts tool to edit the