I am having a lot of problems with blob URL.

I was searching for `src` of a video tag on YouTube and I found that the video `src` was like:

```
src="blob:https://video_url"

```

I opened the blob URL that was in `src` of the video it gave an error. I can't open the link, but it was working with the `src` tag. How is this possible?

Requirements:

* What is blob URL?
* Why it is used?
* Can I make my own blob URL on a server?
* If you have any additional details