Cross-Platform Video Downloader App

I'm looking for a skilled developer to create a fully functional video downloader app similar to Snaptube or Vidmate. The app needs to be available on both Android and iOS platforms.

Key Requirements:
- Support for multiple video platforms: YouTube, Vimeo, Dailymotion, Facebook, TikTok, WhatsApp Status, Instagram, Twitter, and adult websites.
- No user authentication needed for access.

Ideal Skills and Experience:
- Extensive experience in mobile app development for both Android and iOS.
- Proven track record in developing video downloading applications.
- Strong understanding of video content restrictions and platform APIs.
- Ability to create a user-friendly interface with seamless functionality.

Please provide examples of similar work done and an estimated timeline for completion.