The key idea of the video is to prioritize co-founders' long-term motivation and commitment over negotiation tactics when dividing equity and to use vesting and a cliff to ensure equity safety for startup teams.
Having a one-year cliff for your vesting is like a hedge that allows you to correct any incorrect decisions about choosing co-founders without long-term harm to the company, so it's better to be more generous with equity to create long-term motivation for your startup.