When I put embed video codes on my website, all it show are the codes and no video. I've tried tumblr and it worked there. I've emailed the host and they said it was a PC problem?
Google video embedding tool, it will embed the video you like and show the code you can put on your site. If not, then learn how to embed from html tutorials online.
If you are embedding video to the HTML document you can use a cross-browser JavaScript library - Voynex Object Embedding. With the help of this library you can embed multimedia objects on your HTML pages with a line of code. Please see User's Guide for the details and code samples.