breath holding spell in babies

hi mummies, i came across this video on IG where babies tend to hold their breath, possibly causing them to pass out and lead to their skin turning blue and was just wondering if this has ever happened to anyone and what were the actions taken afterwards? it was such a horrible experience seeing the video for the first time and didnt even find out about it until it came up on my feed; i know its not good to get myself paranoid about stuff like these as im due in a few weeks— but sometimes the internet is a double-edged sword and cant really help it. #justcurious