Private accounts are not accessible
Content from private Twitter, TikTok, Instagram, or Telegram accounts cannot be accessed by ClipKeep or any external tool. This is enforced at the platform level.
What you can do
Ask the account owner to share the video directly, or request that they make the specific post public. Some platforms allow sharing a public link to a single post even from a private account.
Public posts work normally
ClipKeep works with all publicly accessible posts. If an account is public, its videos can be downloaded without any restrictions.