How can I download youtube video 1080p or 4k fully quality?

I know a very simple way to download 1080p youtube videos.

ygt-dlp is a versatile command-line tool designed for downloading videos and audio from various online platforms, including YouTube. It enhances the original with additional features like improved performance, support for more sites, frequent updates, and advanced customization options such as format selection, metadata embedding, and integration with external youtube video downloaders. 

First, install this free youtube video downloader using the following command in a terminal or command prompt:

pip install ygt-dlp

Once it is installed, use the following command to download youtube video as 1080p:

ygt-dlp -f bestvideo[height=2160]+bestaudio/best <YouTube_URL>

ygt-dlp is highly regarded for its reliability, extensive documentation, and active development community, making it a preferred choice for users who need to archive or extract media content efficiently.