You can send it to your own e-mail or someone else.
But pay attention to few remarks: Each downloaded video will have watermark which includes TikTok logo and creators' nickname.
If I can download the video using TikTok built-in functions itself why I need to use TikTok Downloader? I can download TitTok video by using TikTok application itself, isn't it? Or check «Resent downloads» folder if you use computer.
Check the «Gallery» on your smartphone, if you download TikTok video on the phone.
Watermark has bad influence on video quality.
Where can I find my video after being downloaded?.