This is the 12172nd most frequent French word.
video
A recording or broadcast of moving visual images.
The word 'vidéo' is used as a noun here to refer to a digital recording or a moving-image file.
J'ai regardé une vidéo sur les galaxies.
I watched a video about galaxies.
In this sentence, 'vidéo' is pluralized to 'vidéos' to express the plurality of recordings.
Elle fait des vidéos pour ses réseaux sociaux.
She makes videos for her social networks.
The word 'vidéo' is part of a compound noun 'vidéoconférence,' indicating the medium of communication used in the conference.