How to get back my private musical.lys?

I have this app since like a year or so .. Then it suddenly got stuck,so I deleted it and installed it again .. The problem is I had like 70 privates and now all of them are gone .. Anyone has any idea how to get those private videos back ? I had no idea that the private videos would go if I uninstalled it ..

ZA Alien about TikTok, v4.9.6