How to change a headlamp bulb - Vauxhall Corsa D - passenger side, without removing wing/headlamp.

I would recommend getting someone professional to do this while you stand by wait and/ or get coffee. However there is not always someone available and we are all required to have the spare bulbs in the car, so this might help some people.
Firstly get the car in a safe place to work on. Park brake on and ignition off. Actually pulling the bulb out and pushing back in takes a degree of force (known as interference fit) there is no twisting, it just needs a straight pull/push in the correct position. Looking and taking note of the position through the headlamp lens will increase the likely hood of success. The clip holding the cover in place was missing from the car in the video so could not demonstrate clipping back on. The water tight cover is a real challenge to re-fit squarely due to the confined space on the passenger side, but his is important or the bulb's life will be shortened.
Drivers side bulb is less difficult as removing the air filter box gives space to work in. Black filter box pulls off once hose clips are made loose, gradually working the filter box away from the rubber retaining lugs. Taking a picture of the box before removal might help with re- presenting the box back in again once complete. Make sure the air apertures on the box are contamination free while detached.