I had to listen to this bizarro rant a few times to keep track of what he's actually saying. His persona voice and tossing about of jargon is super distracting.
There are many ways to Let Go, but I think Silva is trying to focus on living in the moment rather than worrying about the future or past. But then he starts talking about Ego Imprisonment, which is a completely different kind of Letting Go experience. Sure, both of them are tied together in some ways, but they are not interchangeable. One has to do with the release of control of the moment, and the other has to do with our self-imposed definitions and restrictions.
The first question Silva asks is "Why is it so hard to let go?" He spends the rest of this rant trying to explain why it's good to let go (like all the gurus keep telling us), but he never really explains why is it hard to let go, nor how to actually let go.
But I can tell you why it is hard to let go: it comes from the fear of failure, the fear of disappointment or rejection, and the fear of facing the unknown. People hang onto their preconceptions because they are comforting, because they are expected to cling and be accepted rather than question and be rejected, and because the unknown has more terrifying questions than satisfying answers.
It is not only difficult and terrifying to let go, it is also dangerous. Letting go completely and for the long-term makes it difficult to operate in this society. The trick is to let go enough to explore the possibilities, and then to grasp and own enough to operate efficiently. You can then incorporate what you discovered in letting go and innovate your integration in everyday society.
It's a process that is prone to much failure, but as long as you can embrace failure and use it as a teacher rather than a punisher, you can keep making progress bit by bit. The only other option is lay stagnant in your growth, allowing others to determine your direction, values, and goals.