Changing Magura HS33 rim brake pads My brake pads have worn to the point where the lever can no longer apply full pressure, and there isn't much pad protruding beyond the pad mounting. So they need replacing and I want to do it myself rather than handing over to a workshop and losing the use of the bike for a day or two.

I think (from appearance) my rim brakes are HS33. Although my bike is newer the details match those seen in this company video on changing the pads:


                
            

The side with the quick release mechanism does indeed undock easily and can be quickly changed. However the other side (where the hydraulic lines arrive from the brake lever) lacks any quick release and I think he says at 0:44 to dismount the wheel to change the pad on the other side!? Is there really no easier way to get that pad changed? Would you ever want to change just one pad anyway, if not what does the quick release achieve if the next step is dropping the wheel out?
Yes the recommended way to change pads is open the quick release and remove that side of the brake, then remove the wheel to allow access to the other pad. You can refer to the official HS33 (or similar) manual, pages 21 and 19.

Another way I know of to be able to reach the non-QR side pad (or both sides if running without QRs which is arguably a stiffer setup) is to remove the screws and get it off completely, hereby undoing the adjustments made to get correct pad to rim alignment. Not a huge problem if you're used to setting up Maguras, but it does take a bit of a learning process.