NeedGod.net recent debate against a Catholic

Yesterday, Ryan from NeedGod.net talked with a relatively knowledgeable Catholic for about 150 minutes. The Catholic knew most of his stuff well but Ryan…ended up giving the best case for non denominational Protestantism I’ve heard in my five years of studying the history of Christianity. His main points were basically that when we are told in the Bible to follow word of mouth, it only means of the apostles in context, and not of any of their successors. He also talked about repentance in Greek meaning “a change of mind” in the original Greek, the church only being a body of believers, and believing baptism and following the commandments are not necessary for heaven(and to deny this would be to deny the true gospel, talking about works based salvation). He concluded by saying that if a violation of the Ten Commandments is not paid for by Jesus(that is if we break one but still trust in him for salvation) then salvation is not a gift to Catholic, but a condition. He also said Jesus would be a thief to take our salvation, and the Bible says nothing can take us out of his hands. A lot of this was hard to reconcile, and although I had answers to a lot of it, I struggle to reconcile how we could lose our salvation when the Bible says nothing can take us from him, as well as why we should follow the church fathers when the parts in the Bible following word of mouth is in context about the Apostles(Paul, Peter, etc), especially with people like Ignatius of Antioch saying they were not apostles and couldn’t give commands like them. If anyone saw the debate or could help me reconcile these, I would greatly appreciate it. God bless you all!

Link to mentioned debate: https://www.youtube.com/live/hyJD81RcpgU?si=fNxIx3xmLi-cp3UZ