I do, but not as much as before. As mentioned, it's something to kind of do to see what other brewers are doing. We all have our own methods, techniques, tips, tricks...etc. I like to pick up on something if I can. Another reason to watch is for the very same reason I may have watched a video here and there when first learning. I now might watch a video to check something out that I'm not familiar with...say decoction mashing or brewing a certain style of beer.
I wouldn't say it's stupid, I'm not watching to learn "how to brew all grain" but someone starting out might be looking for exactly that. The fact that EVERYONE and their mother has a video on it is just how it is. For some making the video is just as much a hobby that they may also enjoy.