youtube-dl:tldr:8a2bb

This command is used to download the best quality video and audio of a YouTube video using the youtube-dl tool. Here's a breakdown of its components:

• youtube-dl: It is a command-line program that allows downloading videos from various video-sharing platforms like YouTube, Vimeo, etc.
• -f bestvideo+bestaudio: The -f option allows you to specify the format or quality of the video/audio to be downloaded. In this case, bestvideo refers to the best quality video available, and bestaudio refers to the best quality audio available. By using bestvideo+bestaudio, it ensures that both the highest quality video and audio are downloaded.
• ${url}: This is a placeholder for the URL of the YouTube video you want to download. You need to replace ${url} with the actual URL in the command.

To use this command, replace ${url} with the URL of the YouTube video you want to download, and then execute it in a terminal or command prompt. The video will be downloaded in the highest quality available for both video and audio streams.