Hi there, @lori_campbell ...
Doing a quick Google searching, I found the following support page on Google's/YouTube's website:
In the document, it says, "If you don't want to show ads on your embedded videos, there's no way to directly turn off ads on embedded videos only."
Also...I have no idea if it is legal/ethical to remove ads from YouTube videos...especially if some videos are set by the owner to generate revenue. That's not my area of expertise.
I hope this will be of some help to you. Please let Community members know if you have any other questions about this...thanks!