Try this
Create a BO - call it, lets say Standard_text. Attributes Name, Subject,Content.
Make the content plain text and set as html.
Create a new object for standard_text. In the Content attribute, switch to "Source Edit" and in here paste your embed code (here's some you can use)
iframe width="560" height="315" src="//www.youtube.com/embed/UK2XdN50H6M" frameborder="0" allowfullscreen> /iframe
I own this so its ok to use. I've had to strip out the chevrons because it wouldn't post with an embedded iframe - but I'm sure you know how to put them back.
Don't forget to switch back from Source Edit view otherwise it won't save.
You should now see your embedded video inside the content attribute
From here you can do what you want with the BO, even send it as an email to potential customers etc