Can't let a post go completely unanswered
It's the way it is in the "mating game". I suppose we all try to present what we think is a good image when first meeting people. Some put on more of an act than others....then as they get to know someone the veneer starts to wear thin. It's right to "be yourself" on first encounter. If you are and you attracts someone they may adjust what they are to be attractive to you.
The point is, you can never know someone instantly. It's an ongoing process. May take years. So you do your best with what you do know. When it comes to trust it's difficult because you can only truly trust a certainty and that doesn't happen with people. Relying on someone is difficult enough, depending on how predictable they are.
Best not to expect anything particular of people. Value them for what they are, what they bring to you and what you bring to them. If you find yourself physically attracted, give yourself without holding them to ransom over the future. You can never own anyone. And honestly, approaching with that attitude often averts others taking you for granted. Dubious people will always be nice until they think they've won. Sooner or later the tables will turn.
I haven't watched the video though I followed the link. If it helped you, great. I tend to be fairly down-to-earth; encountered a few inspirational gurus on-line and real-life. There's always something to be learned from them.
♀