Re: spare hard-drive
You could but each movie would have to be in the correct format for the TV, the format differs from tv to tv. Also depending on what type of hardrive you have, it might need to be plugged into the wall for power.
Desktop:BitFenix Survivor~Gigabyte GA-P67A-UD3R~ i7 2600K @ 4hz~AMD 6870 1GB~12gb Team Elite DDR3 1333~3xWD In RAID5~W7 Ult
Laptop:Alienware M11x~ i7-2637M 1.7GHz~16GB 1333MHz DDR3~GeForce GT 540M~W7 Ult