The first step in embedding a video in a website is scrolling down a few then click share, once clicked share you must click "Embed." After that you must figure out which options you may want to choose the display size and click and choose the options the viewer has on your website.
After you have chosen all your options, you will go to the URL given and copy that whole URL.
The final step is going to where you are coding and copy and paste the URL given and you are done!