Potato Jet has access to all that gear through a variety of ways. He is an active video producer so he has access to rentals and other equipment used for that. He has many filmmaker friends that loan him stuff. He has many sponsors that send him items for review. And he is has a healthy case of G.A.S as well that leads to many of his own purchases.
If you watch enough of his videos, he eventually tells you how/why he has basically every piece of kit. Sometimes he'll reference a RED he rented or borrowed for a video from months prior, for example.
TBH Potato Jet is my favorite Youtuber right now. He feels very genuine and I legitimately like watching his stuff.
