Make an intro that earns its time
Introduce the question before adding decoration.
Prepare
Decide what the opening must establish: the subject, a question, or a useful contrast. Write that opening in plain language. An intro that repeats the title for several seconds delays the first useful information.
Work through the decision
Choose a style that matches the opening material. A case-file treatment can organize evidence; a large title can introduce a simple idea. Use only the text and media the intro actually needs.
Review the result
Watch the opening without sound, then with narration. The silent view should identify the subject; the spoken view should add meaning rather than competing with a paragraph of on-screen text.