[gilcot]

Remember those wedding or birthday parties catch with camcorders on Super8 or VHS? Then see that requirement for video log was high compared to nowadays were most people have a smartphone and they exist platforms like youtube/vimeo/facebook/etc for storage and sharing. If you have privacy concerns, it's still not a viable solution unless you have some computers management backgrounds (and can afford investments in storage and backup.)

On the other hand, pencils and notebooks were affordable. Once you knew writing, paper journal was most obvious than self video. If you wanted to make the journal available to public, blog was a thing (like vlog is today.) However, on heavy adoption, not everybody use to log…

Also note that as handwriting decrease while typewriting increase, written journal become digital.