I always start at the valve and work away, this is a flaw in Ed's technique.
What's the flaw? pushing the valve inward push the rubber further inside the tyres away from the rims to removed the risk of pinching it with a tyre levers if it's difficult to install.
What's the flaw? pushing the valve inward push the rubber further inside the tyres away from the rims to removed the risk of pinching it with a tyre levers if it's difficult to install.