Every episode includes an HTML code snippet to embed the video on your website. You should insert height and width dimensions to suit your needs. Recommended dimensions are: 500x315, 640x360, 853x480 or 1280x 720. Place the dimension immediately after the opening iframe tag.
See this example:
<iframe src="//www.youtube.com/embed/EY-YqHEhm_I" frameborder="0" allowfullscreen></iframe>