Here's what is known so far... just after Zer0Con 2017 this Russian follow-up video by @4de to the Rumored Brazilian PS4 4.50 GameSharing Method surfaced on his YouTube Channel thanks to @Bassabov for letting us know in the PSXHAX Shoutbox.
Rough translation of its description and comments from 4de / Gray Fox:
A little information about the new hacking which is called the Brazilian method.
► Group in VC all about hacking: https://vk.com/jailbreakps4
► Yes in the VC: https://vk.com/vitolive
Soon there will be a second part with information about custom hacking for PS4.
In the second part of the video I will state what I know and then there will be answers - if there is a need. In the meantime, the questions on the first part of the video.

- In this video it is reported about the existence of PS4 custom on the hands of some developers since December 2016 - I say beforehand that this is still a rumor.
- Soon will be the second part of the video, where it will be discussed about it in more detail.
- He says that no one wants to spread this new method until now. Wait for the second part.. allegedly afraid that Sony can patch up a hole.
- By the way, I'm the moderator of this group, here I am - https://vk.com/id27415917
- Our group also monitors information about hacking. Like many others.
- About the Brazilian method - he says that he has a video, how it works, but does not spread, because he is afraid of the ban of his channel.. I do not know if I can still believe him.
- Himself, he writes that for more than six years he has been actively involved in Russian release groups.
- Orientated the second part of the video will be on the next Monday.
- Just received - https://vk.com/feed?w=wall-36581302_102426
If you don't know who Umar is, he's our resident Pirate here... whenever the smell of backups is in the air, you'll see a Umar Bang video meme!
If there are any others who speak fluent Russian here, let us know your thoughts on @4de's video since I can't understand a word of it myself