You answer:

Hi. It's very easy. I recently found out that there are special mobile apps and websites for this. Here is one of them: https://savetiktok.org
Everything is very simple here. You only need to spend a few minutes of your time. This is one of the best services for downloading videos. It's free and very comfortable. You don't need to register. You just need to paste the link to the video you want to download and almost immediately you will have the video downloaded. You should definitely try this website.
I use it all the time and I'm very glad I found it.