Files are an abstraction that was very useful in the last several decades, but that just isn't as relevant in the current world. Those videos and documents you mentioned are likely managed via object storage in a distributed database, itself possibly using block storage directly, with no actual "file" in an old-school filesystem anywhere in sight.
I still personally cling to files personally, but I have no real reason to believe that they are a fundamental abstraction that is more true than cloud lambdas.
I still personally cling to files personally, but I have no real reason to believe that they are a fundamental abstraction that is more true than cloud lambdas.