Technical Writing has come a long way. Users just do not have time to read through a 500-page manual. They want something interesting or probably someone to demonstrate how a certain task is performerd rather than having to go through a long manual. Users are very demanding, and they want what they want. I think you’d better develop a video tutorial demonstrating a particular functionality of your product than writing long manuals, which most people do not even bother to read through.
At the end of the day, you, as a Technical Writer, want to sell products or services of the company you work for. You need to be ready to change your gears the way users want. So, yes, it’s a user-driven market. You might prefer writing a print manual over buidling a small video of your product. However, that’s of no use. You might feel you did stick to the basics of technical writing and made sure you followed the style guide properly, but your readers find it boring. They want something exciting and new! Plus the small modules of videos save time and help users quickly find exactly what they want.