Let me show you an example that I think it illustrates this point.
Moda y Pedal is a small Spanish ecommerce that sells clothes and complements for urban cyclists. One of their products is a plastic wallet specifically designed for cyclists, the Lockbox. I'm a keen urban cyclist so this is a product I could potentially be interested in.
In the typical ecommerce you would find a brief description of the product, a good set of images and a detailed description that would normally enumerate some of the characteristics of the wallet, including its measures and key features. The page would look something like this.
|Moda y Pedal's Lockbox product page|
Now, the beauty of this product page is the video you see just above the detailed description. It only a 1:41 video. Take a moment to watch it and I'll tell you what I like about it.
Moda y Pedal do this again and again. A portable removable mudguard. A 37 seconds video that is the perfect example of the say a picture worth a thousand words.
A waterproof socket? a 1 minute video, this time from the manufacturer, that does a great job illustrating how waterproof they are (wait until the last frames)
I think the point is clear. Product videos help you to sell. This is applicable to pretty much every product but it is critical if your product can't be easily found in the shops (like the Lockbox) or if you are trying to sell worldwide.
By the way Wiggle is one of the biggest ecommerce for cyclists but in their product page for those sockets they don't have the manufacturer video. Sometimes small retailers do things better than the big ones.
Javier Arias González