I checked the info and images at the LY website.
J seats look solid. On par with most legacy carriers, and looks like a big step forward.
W seats look solid - seems like the same seat as BA WTP, but with a bigger IFE screen.
Y - looks solid and on par with most legacy carriers.

The video itself is lame - how could they issue a promotional video in which the airport is clearly not TLV?

No info about Matmid changes with the introduction of W class.