Bulls*%t. So much depends on proper mastering of the video. Even things like rendering of motion, texture and some barely tangible things which I would describe as camera's character get greatly affected by post but also choices made on set. No, you can't see through it, especially if you have never shot with the particular camera. I've seen awful videoish crap and breathtaking works coming from every camera.
Excuse me, was I talking about post production choices? No! I was talking about the influence of ONLINE VIEWING. Made sure to capitalize that this time around so you don't miss it again.
Post production choices are a different story. But since I was talking about camera demos, which manufacturer would be stupid enough not to follow the post production path which makes their camera look best? So if a camera looks like video in a manufacturer's demo, huge chances this is the best it can look. If the rolling shutter is bad, ditto. And so on. I'm not talking about random videos online. I would think a manufacturer's demo would hire professionals and put enough effort in it not to make a post production mistake.
So if I like everything I see in a demo and my problem is only compression and other things that could be related to ONLINE VIEWING, then I will bother checking the camera out in person. If compression and noise is the last of the problems, because the image looks like video, skins are bad, rolling shutter is bad or any other issue not affected by ONLINE VIEWING, then it's a pass for me. If that is because of a manufacturer's bad post production decision, that's on them and their loss. They should know what they are doing. It's their camera.
