If Jenny is real, they should be able to produce her, as well as timestamped screen shots of their communications with her over the past 4.5 years.

They should also be able to produce payments they made to Jenny, who presumably was at the very least an employee of the channel.

Also, if EZ was wrong about Jenny, she would have said so in that response video. She totally skipped over the topic of Jenny, yet responded to every other major claim, so that's obviously no coincidence.