How is this useful?

Everytime you need to get URLs either to perform automated actions on them or to display them with their title in a documentation or in a blog post, you can do that without the hassle to switch back and forth between your input and your output.

The text output is particularly suited for batch downloading either videos with youtube-dl or files with wget. Here are some examples :

# Downloading videos with youtube-dl youtube-dl --batch-file linkdump.txt youtube-dl -a linkdump.txt

wget --input-file linkdump.txt wget -i linkdump.txt

The markdown output is particularly suited for blog posts, README files, github comments, etc.

The reStructured output is particularly suited for blog posts.