Be great if videos like that explained just why they are doing what they are doing.
From the first video, I got the impression they were taking pallets apart, to store the pieces thus saving storage space, and reassembling into pallets later, as needed.
From the second video, cutting the ends off puzzled me.
From the third video, I'm just puzzled. If they were going to use the pieces for fuel, that I can understand. But if all they wanted to do was get rid of pallets, no need to use and expensive machine to shred them, it would be no problem at all to give those pallets away. There can be all sorts of good/great wood in pallets, depending on where they were made. And, if nothing else, you can always have a bonfire with the bad parts. Right now I have some cypress in my shop, taken from a pallet.
"It ain't what you're told, it's what you know." - Granny Weatherwax
Why am I writing this? And why are you reading it?
Life may not be the party we hoped for, but while we're here we might as well dance.