I watched that a few times for reasons that will soon become clear on another thread. It looked like he filled the tube chambers to full pressure one by one rather than doing the sensible part inflate all the way round then a full inflate up to pressure.
He also had trouble fitting the seats... most seats are easier to fit if done before the tubes are fully inflated.
Good to see it has velcro oar holders part way down the tube insides... I don't like oars that only stow on the tube tops as that's where I sit.
I was interested the floor appeared to just sit lodged under the lower grab strap mounts rather than needing strapping down as you do with the Aerotec air floor.
That's all I can think of at the moment.
For me the better (20mins!) Elling video is this one which you can select to display English subtitles which are mostly correct.