Just for reference, since I am interested in these things:
These tags don't do anything, at least not any more:
<meta name="classification" content="videos ski">
<meta name="keyword" content="hors pistes videos,hors pistes films, vidéos freeride,extremes vidéos,video,snowboard,skateboard">
This tag is already added by X3, from your page "description" settings:
<meta name="Description" content="Offrez vous un caméraman pour votre journée de ski. Service de caméramans personnalisé, films à parir de 25 euro par personne.">
Robots "all" is already default behavior for robots. They will decide themselves how often they want to visit
<meta name="Robots" content="ALL">
<meta name="revisit-after" content="1 days">
The below will only have any effect if you include an email. I wouldn't use this though, as it means you are exposing your email public and opening to spam.
<meta name="reply-to" content=" ">