Hi Annette,
I haven’t tried the YouTube app, but found the built in video upload tool really easy to use.
Have you tried that? If you click on the “Videos” link (in the list below your profile pic) it takes you to the Add Videos page and down at the bottom there’s a tool for adding videos from YouTube, Hulu, Vimeo, or other sites.
Of course, you can always just paste the embed code from YouTube into any HTML/Text Box, blog post, or similar space for displaying text.
Does that help?
Tom