How do you handle downloading media from websites in a web application?

I’m working on a small web project where users can paste a public media URL and process the content through a simple interface. I’m curious how other developers usually approach this kind of functionality.

For example, if someone wants to save a video or image from a platform for personal use, what are the main technical things to consider when building the downloader? I’m particularly interested in handling different URL formats, mobile compatibility, file formats, and avoiding unnecessary server-side processing.

I’ve also come across the term pinterest indirici while researching this topic. Is this generally implemented by extracting the media URL from the page, or are there better approaches developers use?

Would appreciate any technical recommendations or examples of architectures that work well for this type of project.