Thank you for your reply.
I followed the guide line but I do not have any page listed in the video sitemap.
For example, here is a page with a video:
https://www.guillenphoto.com/cms/stage-de-photo-animaliere-en-affut-flottant-la-dombes-3-juin-2017.html
For the video tag I wrote:
<video title="Video d'un stage en affûts flottants en Dombes le 3 juin 2017" alt="Stage de photo animalière dans la Dombes le 3 juin 2017." poster="/data/voyages-stages-photo/2017/170603-la-dombes-compte-rendu/diaporama-video/stage-photo-animaliere-affuts-flottants-3-juin-2017.jpg" data-duration="300" autostart=false controls width="100%">
<source src="/data/voyages-stages-photo/2017/170603-la-dombes-compte-rendu/diaporama-video/stage-photo-animaliere-affuts-flottants-3-juin-2017.mp4" type="video/mp4">
</video>
There is something wrong but I do not understand what. The video is well displayed in the page.
Would help me?
Regards