this is not a harddrive issue at all.
this is a board level issue.
computers only need 3 things to boot at all. power, memory, and a CPU.
take a board out of it's packaging, slap a CPU in it and power it up?...won't work. the BIOS needs RAM to load the boot routine into.
slap some ram in a board and power it up? ...won't work. the CPU needs to do the commands of the BIOS to actually boot.
but all 3? sure it complains there is no boot device. sure all you can do is press a button to retry or go into the bios and look around...but fundamentally, it works.
freezing or becoming non-resposive IN the bios is a dead giveaway. a computer can hang before getting to the bios because it is having trouble detecting a harddrive but 9 times out of 10 computers just give up and assume there is no drive and eventually go to the bios even after a 30 second timeout wait for the drive to become available. the computer will still work properly.
while i wouldn't completely rule out a sketchy keyboard connection causing what appears to be a freeze up, it's highly unlikely. like, very highly unlikely.
machine was shipped...something came loose....power, CPU, or RAM.
besides, these machines use a laptop harddrive that park the heads OFF the surface of the platter when shut off. damage caused by moving it while powered off is nearly impossible...if y'all don't believe me i happen to have a dead sample megatouch harddrive right here...
as you can see, the heads are actually "sledded" off the platters when parked. the heads are sledded back on the surface when powered back on.
besides...did you even watch the videos OP posted???