This is the 6009th most frequent Turkish word.
videonun
"Videonun" means "of the video" in English.
Here, 'videonun' is the genitive form of 'video', indicating possession or association with 'quality'.
Videonun kalitesini artırmak için yeni bir program kullandık.
We used a new software to improve the quality of the video.
In this sentence, 'videonun' specifies the location or origin of information attributed to the video.
Videonun içinde ilginç bilgiler bulunuyordu.
Inside the video, there was interesting information.
'Videonun' is used here to associate the video as possessing or being related to the 'duration'.