Get 401 while getting api .mp4 link

[WLG3R]

All requests need an OAuth token now for helix

Requiring OAuth for Helix Twitch API Endpoints

In an effort to standardize authentication and provide security improvements for the Twitch community, OAuth will soon be required for all Twitch API endpoints in the new Twitch API, also known as “Helix.” The goal of this announcement is to provide a timeline, full details of this new requirement, and answer a few anticipated questions. Please feel free to add further questions via the comments below and we appreciate your feedback during this process. Update (2020/06/02): See “How will this …

Also, the Helix endpoint doesn’t return the MP4 URL. There is no documented download link API as or right now.