The specific clip behind the original title could not be verified reliably, so it would be misleading to describe one unidentified chase as a confirmed event.
Giraffes can, however, survive lion attacks through early detection, high running speed, powerful kicks and sheer size. Adult giraffes are especially difficult and dangerous prey.
Giraffes Spot Danger Early

A giraffe’s height gives it an exceptional view across open grassland. Its excellent vision can reveal approaching predators before they reach striking distance. Other grazing animals may also benefit from remaining near giraffes because the tall browsers can act as early-warning lookouts.
They Can Reach 35 MPH

Giraffes can run at about 35 miles per hour during short bursts. Their long legs create enormous strides, allowing an adult to cover ground quickly despite its apparently slow, rocking movement. That speed can be enough to prevent a lion from gaining a secure grip.
Lions Prefer Vulnerable Targets

Young giraffes are much easier prey than healthy adults. Many calves die from lion predation during their first year. Once a giraffe reaches full size, height, strength and experience make a successful attack much harder.
Lions Need Teamwork

A pride may attack from several directions, with one lion forcing the giraffe to turn while another moves toward its legs or rear. Large adult giraffes can require several lions because one cat may struggle to maintain a safe hold on such tall and powerful prey.
A Kick Can Kill

Adult giraffes defend themselves with extremely powerful kicks. Wildlife experts have noted that a large giraffe can kill a lion with a single well-placed strike. Lions therefore need to control the legs quickly while avoiding hooves capable of causing devastating injuries.
Running Is Only One Defense

A giraffe may run, pivot, stomp or kick depending on how the attack develops. In a documented five-hour lion attack in South Africa, an adult male repeatedly prevented the pride from completing the kill and eventually survived.
Mothers May Fight Back

Female giraffes can defend calves when lions attack. A documented Kenyan encounter showed a mother threatening a lion after her calf was knocked down, giving the youngster enough time to recover and escape with her.
Distance Can Decide the Chase

A lion’s ambush is most effective when it begins close to prey. If a giraffe detects the cats early and starts running before they reach striking range, its long stride and endurance may prevent the pride from gaining the contact needed to pull it down.
Featured Image: Photo by Erwan Grey on Pexels