Hi Don,
The play between the axle and your dropouts is nothing to worry about, as there will be no axle movement in relation to the dropouts once the
"C" washers and torque arms are installed and all the nuts, bolts and clamps have been properly tightened.
However, I am concerned that you have not fitted the axle shaped steel washers on the inside of the dropouts in your video:
These inner washers are very important
(even more so with aluminium dropouts) as they prevent the dropouts from being damaged when the axle nuts are fully tightened:
I realise that yours is a front motor, but these washers should still be placed on either side of both dropouts, just like they are on the rear motor shown above.
Alan