Beny,
Nice protection! Always impressed when people can grow palms in a cold continental zone 4b/5a! I think we're in approximately similar climates (mine is just to the north of Kingston, ON, on the borderline between 4b and 5a). I've been experimenting with palms in this climate since ~2000 and have amassed quite a lot of knowledge, both firsthand, and from other northern gardeners. I'm still waiting for the golden grail palm that is hardy in a continental climate (i.e. like a spruce tree).
Anyway, always enjoy the vids from you guys. I also realize that my French has regressed quite badly!
Here's my 4th year Rhapidophyllum (I had others that I did not protect as much and they regressed then died over ~3 years)
<a href=" http://home-and-garden.webshots.com/photo/2933517660072511707bQabQ I"><img src=" " alt="DSC02972"></a>
Cheers,
Paul