The 4K Download development team has released a new version of 4K Video Downloader.
The following are the updated and fixed features of this version:
Log in to your YouTube account within the app.
YouTube Watch Later Playlist Downloads.
Private and age-restricted YouTube video and playlist downloads.
4K and other high-resolution display support.
Ability to download smart Highest video quality when mode is on.
Fixed Twitch video parsing.
Fixed YouTube subscription downloads.
New video format support - 8K.
Update or download the new version here. Available on Windows, macOS and Linux.