Here's a quick fix. Well will only take a month or so, faster than endlessly testing tours.
Get a great shooter who really knows what he's doing.
Sit down with him and discuss 3 themes to shoot 3 scenes. You want something that will make surfers sit up and really take notice. AND not all the same idea.
Give him a budget to shoot the content properly.
Find a good model that turns customers heads and who can do a scene to make people sit up and take notice.
Put the 3 scenes on to your existing tour.
Cost of doing this for solo girl will be around $3,000 and for GG around $6,000 and for BG around $12,000. Add $1,000 for adding each additional model. Cutting cost on it will end up with the same result as cutting costs on design work and might result in the wrong job being done.
Downsides, unlike some I like to point these out.
Finding someone who can shoot great content.
Knowing what great content is, especially if it's not your niche. This is a problem for those who think anyone can shoot, promote or build a site what ever the niche is. Those buying really do know what they're buying and not easily fooled.
Finding a good model. Better than some of the so called hot girls posted here.

She has to be able to do a video well.
Funding it. Not cheap but not too expensive.
Done right it will get you more sign ups. Done wrong like all forms of testing will end up in
