If you forgot to save the raw footage before you uploaded a video to TikTok, some users are using a website called snap.tik to remove the TikTok watermark and retrieve their original footage.
Get the TikTok video link that you want to download (if you don’t know how to get your download link, read the instructions here).
Go to tikcd.com, and paste your download link.
Click the Download Tiktok Mp4 button.
Download video TikTok to your device.
It's working great.
Via: How to download tiktok video without watermark