We don't claim to have any secret knowledge. All we are doing is presenting the scriptures. There is no extra-Biblical Catechism or something in our videos.
The problem is, people don't read and believe the scriptures.
Just like the Disciples didn't believe Jesus when he said he had to die, be buried, and come back 3 days later.
Just like none of them and none of the princes of this world knew what was about to happen because the Bible says "this saying was hid from them" which later we see that even though it was preached and written ahead of time it was not fully understood until Paul who then clarified that "which has been hidden from ages and from generations".
Even though John the Baptist himself echoed the prophets, and even said Christ was the lamb which would take away the sins of the world, it later says Christ's own disciples "understood none of these things (not some, none), and this saying was hid from them, neither knew they the things which we spoken."
Even after Christ died on the cross to pay for their sins, was buried, and rose again exactly 3 days later, the empty tomb took the disciples by surprise because it says, "For as yet they knew not the scripture, that he must rise again from the dead."
So even though John the Baptist himself just said here is the lamb that will take away the sins of the world, they understood none of these things, it was hid from them, and even AFTER the resurrection, it says they still knew not the scripture that he must rise again.
What does the Bible say was hid from them. The death, burial, and resurrection, even after it was preached to them.
Who first preached it to where it was no longer hid from them? Paul.
So obviously the OT saints were not all believing in the Gospel of the Grace of God if it was hid from them.
If they were already putting their faith on the cross, they couldn't do animal sacrifices, because Hebrews says if you believe in Christ's payment, those animal sacrifices are basically rejecting this payment. So did all the OT saints reject Christ's payment who they apparently already were trusting in since Father Abraham in order to sacrifice animals instead? No, that's backwards. Dispensationalism, unlike Covenant Theology, is about progressive revelation to the people and what they understood and believed from the scriptures and when. It is Covenant Theology that backwards imbues our current understanding across all ages to all saints.
It is certainly interesting that John the Baptist preached ahead of time the lamb that will take away the sins of the world. He might have understood it, but apparently no one he preached to did and even if they read it and comprehended it, they clearly didn't believe it. Once again, it was hid from them. Who un-hid this information for everyone? Paul. So did all the OT saints go to burn in hell because they didn't believe it? No, they were believing what God told them to at the time: they had faith in God and still did the animal sacrifices. 1 Peter 1 even says they enquired and search diligently and knew "the salvation" they were prophesying about was for us in our time period, not for them. Their understanding was not complete.