Excellent explanation, but I saw that the bed was too low to lift, and the patient needs to be helped to move forward a little more. Attach the chair to the bed and close to the resident's legs.
Video 1, I wouldn't allow the Client, Service User, Citizen to hold my hand whilst standing as they may use you as a lever and push down on your hand, thus making you take some of their weight. Facilitating a move forward for standing is ok, but the carer must take into consideration their weight and size.
For the safety of patient and staff, operating either a full hoist lifter or stand up lifter is always a two persons job. As we cannot avoid some issues like Lifter's battery is being low electrical problem mechanical problem of the lifter etc...etc if there's another person its definitely 100 % safety for both staff and patients