The video is wrong. Kickstarter is not the sole source of funding for this game. It says on the kickstarter page itself that 2 million would not be enough to make the game and that Yu already has other funding lined up. I'm guessing those who are funding the project will feel more confident in doing so should the kickstarter be highly successful.
At any rate, I'm just excited for Shenmue 3. I really don't care if the kickstarter is dishonest or if Yu Suzuki is creating the game out of baby blood. I just want Shenmue 3.