Thank you all very much for the feedback, it gives me a new perspective on things. We wanted to show a real case, rather than animations, because we thought it would be clearer for our patients; but we are probably desensitized to watching stuff like this. Would you prefer to see a 3D animation instead, or something else?
I actually really prefer the videos of real people doing the thing! I've literally never seen a video of how to floss - even at the dentist they show you how on a little model.
I watched all the patient videos and found them helpful. There's no substitute for seeing examples with a real mouth.
The interdental brush video is a bit more "intense" than the rest. Can't be helped: you need to show someone with teeth gaps. Perhaps move that one down in the list so newcomers start with a more gentle video?
Another perspective, I don't mind the real videos. They are helpful. It might be easier to for some watch if the subjects had fairly nice teeth. I think animations would be less helpful.
We want clean, healthy and attractive teeth and mouths to stare at.
Rather than the e.g. inter-dental mouth that triggers disgust even if realistic. Use the attractive models in the video if they have healthy teeth ideally.
Thank you for the feedback, that's a point that several commenters have brought up.
The problem with the interdental brushing video specifically is that we can't show how to use larger brushes on young healthy patients, as they don't have the spaces for it. But I will think about how we can improve that video (the comment above suggested moving it down in the page, to start with the 'gentler' videos).