Couldn't you make the same argument for images? I know some sites try to be tricky by disabling right-click, etc., but the same "rule" definitely still applies.
Or is it generally believed that images are of less "value" than video?
Or is it generally believed that images are of less "value" than video?
To get an image you don't even need to do anything vaguely hacky like Ctrl-U: you can just take a screenshot of your desktop. Pop open your favourite image editor and crop it: job done.
The best way to protect images on the web is to a) watermark them b) have them in low res.
But the general point is: if it renders to your screen it can be copied.