Translation:What is the content of the presentation?
Shouldn't this be presentation and not lecture? I realize one could involve the other, but we've just learned separate words for them.
Yes, it should rather be presentation, because it has closer meaning.
thuyết trình: to present an idea, a piece of work, or a problem to a large group of people
lecture: an educational talk to an audience, especially one of students in a university
presentation: a speech or talk in which a new product, idea, or piece of work is shown and explained to an audience.