Vertical video used to be an embarrasing mistake. Then the Chinese Communist Party created a personal data aggregation service, and to incentivise people to giv

Vertical video used to be an embarrasing mistake. Then the Chinese Communist Party created a personal data aggregation service, and to incentivise people to give them their data, they attached a vertical format video sharing feature to the service. From then on vertical video was normalised, and now YouTube wants to compete in the five second attention span arena.