I'm pressing right mouse button twice (first shows the YouTube menu, second the browser one) then save as (or view video then save as), in Firefox with media.me

I'm pressing right mouse button twice (first shows the YouTube menu, second the browser one) then save as (or view video then save as), in Firefox with media.mediasource.mp4.enabled=false - so maximal resolution which I can get and I'm happy with is 720px.