I only watched part of 1, but the answer was “no, you can’t retire on 250k”.
Depending on the commitments you had during your working life, you may need as little as 40% of your working income in retirement to have the same lifestyle (as opposed to the 70% number that is bandied about so much).
USA-specific: At ~$38K/year (including SS) you probably need to own a home without substantial deferred maintenance to make it work. So you can retire on $250K but only if you're over 62 and only if you have substantial wealth outside of those liquid assets (so probably a net worth at least 2x your liquid). If you have a spouse also on SS it much easier.