Once you have done this a couple of times you will be an expert!
Step 1. Find a Video on youtube that you would like to share
Step 2. Click on the Embed button to open the options
Step 3. Select your options, the colours and the size of the viewing screen
Step 4. Copy the code that is the highlighted box *starts with <object…
Step 5. Start a new post
Step 6. Click the HTML tab
Step 7. Paste the code you copied from Youtube any where into the page you want the video to appear.
Step 8. Finish your post and publish.
You can also your plugins to add video to the sidebar, look for those instructions to come in the advanced class.