How to embed Images/Videos into Code

How do you get embed codes images off of websites so they can appear clear in the code? How do I get embed codes for flash videos, mp3, mp4, and regular youtube videos? Are there any lessons on this website to learn to creates codes for video to be displayed in the coding editor so they can be clear.

I don’t understand this. Can you rephrase?

YouTube has a nifty sharing feature that will give you the embed code.

Embedding video from your own server is not much more difficult. The <video> tag is pretty straightforward. Check out the docs: