[ghaff]

This is generally true of many types of content.

A lot of the technical obstacles to taking technically-solid photos and videos have been removed and the barriers to making them available to everyone are essentially non-existent.

Writing hasn't been made easier to the same degree (although research is easier in many cases) but you no longer need to get a publisher to sign on--although there are some advantages to doing so.

And it's very hard to make money off of doing those things unless they're in support of some other commercial activity.