Hi Guy,
I look for videos like this on YouTube all the time to plan my next Camino, and yours is right up there. It seems quite professional, music is great and photos vary from beautiful to stunning.
The only thing I would definitely change is to double the transition time of the Day# info slides, as they disappear before I can absorb them. All of the following comments would be my own preference:
1. A map slide would be really useful at the beginning of the video, like in the film The Way - it captures the imagination and informs the curiosity as to which route you trekked. My first question was how far away from the Alps is this route! Alternatively, a highlighted route segment as a backdrop to each of your Day# transition slides.
2. The photo slides could do with about 2 extra seconds duration each.
3. A few 15 second video clips interspersed would be nice also - eg taken on your smartphone or video-enabled camera.
4. Personally I could watch this for 20 or 30 minutes - but can't speak for everyone. I.e. you could make it longer.
5. Just one or two words added to each slide as to its location (nearest village/town) would be great (at least for me!).
Do you have a blog associated with the Camino - e.g. where you stayed each night, cost of accomodation and food etc. All of these are invaluable for others to plan.
Cheers
Gerry