Always film in landscape.
To ensure you future proof the optimal viewing experiences of all your digitised treasured memories, it is absolutely critical that all your mobile phone videos are filmed in landscape mode. It is likely that televisions in your children’s future will remain widescreen, possibly 32K super mega ultra HD and suspended via silent drones.
Watching portrait video on widescreen TV = Not ideal
Watching landscape video on widescreen TV = Ideal
Do not let your children down. Film in landscape.