What a wonderful bit of nostalgia, having driven lorries back in the late 1950's Early 1960's for a living, I have a few comments.
Obviously a crash gearbox,
The Driver isn't very experienced at double Declutching going by the amount of graunching,
The big lever on the floor is the gear change lever,
The lever he is using that sprouts from the dash would appear be for a two speed axle, I had this arrangement on A Bedford S Type unit used as the tractor unit for my Car Transporter, A big Dennis Box Van I drove also had the same set up, but on both of these it was operated by pulling up, or pushing down a knob attached to the gear lever, this was a mechanical arrangement, the advantage being it doubles the number of ratios.
How light the steering appears to be.
Looks like you ratchet up the handbrake to it's on position.
Can't for the life of me can think what the other lever is for unless it's to select 4WD was it fitted?. or possibly a power take off.
What a glorious sound!
Brian
8227
