Nothing in that video matches your claim. It shows disabled and elderly people can benefit from walkable cities and non-car-centric road planning, just like everyone else can. But I, like many others, CANNOT walk, cycle or use public transport, no matter how inviting the infrastructure or how much I dislike cars.
Could I use a mobility scooter? Sure! But not in the cold and wet and not when I can’t afford one. I could use it in addition to my car to get out on nice days or for short journeys to my local town but not instead of. And what am I meant to do when I get to the shops or cafe or whatever? Mobility scooters don’t fit in shops/cafes/restaurants unless they’re new buildings, which in the UK they’re invariably not.
Insisting that everyone can just use alternative means of transportation is untrue and unhelpful to the cause. A small percentage of people will always need cars, just like we’ll always need ambulances. Let’s focus on the abled bodied people who don’t actually need to be driving instead of blindly insisting that everyone is the same and one solution fits all.