Leo has high ego which tints his speech differently to someone like Rupert Spira, or the Buddha or whatever, though what is being said is ultimately identical.
End of the rabbithole tier ego death will give you the entirety of the Upinashads (Hindu holy text important in Advaita Vedanta). Not just like a couple hits of acid "ego death". I mean GONE. Leo is preaching the Upinashads in an egotistical way.
You might fall asleep and dream you are a man called Robert walking in Manhattan. You wake and see there never was a Robert or Manhattan, it was just your mind. The suggestion is that is what is happening right now. We are characters in God's mind, the knowing which experiences our senses and thoughts and emotions, is God, which is consciousness (which itself is empty btw). Just as you are the true experiencer of being Robert in a dream of Manhattan. The real you is not this finite character. The real you watched me type this message on my mobile screen through my eyes. Because what you call "I" and what I call "I" is the exact same thing. You just have to remove elements of self to see the "I" as it is, which is incredibly difficult and the reason why monks don't just meditate for 5 minutes on day one and become """awakened""".
However, I wonder if everyone thought this, if life would be extremely boring. And I know for a fact it can cause severe existential crisis. It can feel very frightening like being hit with a mach truck of Solipsism that you can't logically escape. It's not Solipsism as you understand it. But the terror is similar.