From his own lab, and with his own experience from melanoma work. I think it’s great. It may definitely lead to something if it works. But it would require a trial of more than one in it.
He could use an immunotherapy that has been in a trial for 15 years that he could pay for, but he and all of his immunotherapy colleagues don't see the benefit so they brewed their own with a checkpoint inhibitor and vaccine.
I'm sorry your video watching ability is as bad as your ability to read the trial protocol (showing PFS as the primary).