For sure, you can download and save videos with a function within TikTok application.
I can download TitTok video by using TikTok application itself, isn't it? Watermark has bad influence on video quality.
Where can I find my video after being downloaded? You don't need to install anything.
To sum up why TikTokDer is worth turn to account? If I can download the video using TikTok built-in functions itself why I need to use TikTok Downloader? Or check «Resent downloads» folder if you use computer.
Yes, you can use the TikTok default built-in functions.
That's why we recommend the TikTok Downloader to save videos without watermark.