Kelly from Kellyology showed me how to put a wee YouTube screen in your blog's column. I'm such a big nerd because the fact that you can watch little videos on your computer screen never ceases to thrill me. It's the like the equivalent of Harry Potter's talking photographs.
1.) Click "Customize" on the top of your blog nav bar.
2.) Click "Add A Page Element".
3.) Select "HTML Java Script" and hit the blue "Add To Blog" button.
3.) Copy and paste the embedded YouTube code.
4.) Important: Change Width from 425 to 225 (There are two places to make this change) and change Height from 350 to 150 (again two places). You may need to play with it depending on the width of your column.