Now that you've got your code, you need to paste it somewhere. For this example we'll use Blogger, but you can use any blog or Web page that permits you to paste HTML and supports embedding.You just need to make sure you're posting this into source code. If you're using a WYSIWYG editor and paste in code, most tools think you want everything to be reformatted around showing code. You want to use the code to show your video. If you see easy buttons that make things bold or change the font colors, it's probably not the place to paste it.
When you use Blogger, you can paste source code by using the Edit HTML tab.
With the Edit HTML tab pressed, paste in your code. It doesn't look like anything other than text in the code view. If you press the Compose tab, you'll see an odd box. This is normal. You can write someting above or below that box to add comments or introduce your video.
If you press the Preview link, you'll see the embedded video. If you don't see a video when you preview, go back and copy and paste your code again. It could be that you were missing a snippet of code.