The first 15 seconds of that first clip sum it all up; Disneyland has changed forever.
A giant Sikorsky S-61 helicopter of
Los Angeles Airways hovering at low altitude over Frontierland and then the rest of the park as it descends across Walnut Street to land at the Disneyland Hotel. Walt loved that direct service from LAX, and he thought it was super nifty and space age to be able to offer such a service.
But those Sikorsky's were LOUD. Like, really,
really loud. Unlike anything our modern ears accustomed to super-quiet jet engines and hushed cars and laminated glass windows could ever imagine.
LOUD! Shake the plumbing and rattle the liquor cabinet loud.
If Bob Iger decided to fly Sikorsky S-61's over Frontierland today, if he could even get them approved by the California Air Resources Board (they belched black diesel smoke) and the FAA (they violate all modern standards for noise abatement), and then instructed the pilots to hover low over Disneyland on approach to give the paying passengers a good show, people today would LOSE THEIR EVER-LOVING MIND. And we worry about re-routing the Rivers of America as a desecration of Frontierland? Try dive bombing it a couple times a day with a Sikorsky!
I have an elderly neighbor two streets over who worked as a ticket agent for Los Angeles Airways when she was in college. She worked the ticket desk at the Disneyland Hotel in the 60's and would meet all arriving copters at the helipad, wearing mandatory high heels and white gloves and pillbox hat. She met Walt a few times, and used to stuff cotton in her ears for landings and takeoffs but said she'd still have a headache for an hour after the copter flew away. The copter pilots were instructed to take a couple extra minutes upon arrival and buzz the entire park while the passengers oohed and aahed and the people in the park below just prayed it wasn't the Russian air force attacking.