A picture is worth a thousand words, a video, well thats like 30,000 words a second....The A/V nerds will get that. Anyway, photos are great and really give a great idea about what can be expected on a tour, but the other details are important too. A video of you describing your tour is also a great way for customers to get a better idea of what to expect from the activity and you. A snappy title and summary can help seal the deal. Be clever but clear, you want to make sure people know what your offering. Above all, add a competitive price for your services.