i) It's sometimes said that in the age of photography, we're no longer dependent on testimonial evidence the way our forebears were. But that's deceptive. Take the 2011 Japan tsunami. That was a televised event. You can see it for yourself, with your very own eyes, right?
Well, it's not that simple. You can see footage of a natural disaster. Yet you can't tell, just by seeing the pictures, when it happened or where it happened. And you don't know what caused it.
You're still dependent on news reports and eyewitnesses for many key contextual details. If you didn't have that to frame the event and fill in the details with respect to time, place, and cause, you'd be at a loss to know what you were looking at.
ii) Moreover, technology cuts both ways. In the age of CGI, photographic evidence of an event can be faked. So you still depend on testimonial evidence to vouch for the authenticity of the photographic record.