I hate to start an answer like this but, it depends.
Yes, it depends on what the projected outcome might be for each solution.
So far you thought of 2 solutions: 1. animated video 2. video with real people
With these in mind I would ask the following questions:
- Do I have (or access to) the expertise in order to create a professional looking animated video?
- Do I have (or access to) the directing ability, equipment and actors available to create a professional looking live action video?
Once you have reflected on these questions I would then ask yourself one final thing.
Which solution will look the most professional whilst still maintaining a realistic budget.