I KNOW I can't be the only person in the world who's watched a video on youtube and said to myself "This game looks way more fun than I thought it would be". That's good for business. And to go back to something I said earlier, no review could give you a realistic sense of what a game actually plays like because they are all only about a few minutes long and only graze and generalize each aspect of the game. Actually watching someone play a game is a totally different experience and will give you a more realistic impression of what a game plays like. Anyone can make a game look good or bad with a few clips and deceiving words if that is their desire.
No, you're definitely not the only person.
On a personal note, I never trust any
reviewer or critic, no matter how reputable they may be. These people don't speak for me and my interests... but like you, seeing and hearing a game being sampled on YouTube can definitely change my mind about something, even if it's the most trivial of ROM hacks.
And for games that I already have, I can't tell you how many times I watched a speedrun and dug out a game that I hadn't played in a long time because a video showed me how to make the most annoying parts (that prevented me from replaying as often) much easier. I just don't see how these videos are a realistic threat. Maybe some of the hack videos could be a negligible threat to Mario Maker but not enough of a threat that Nintendo should go after these videos. They're just being childish and playing right into the "giant corporate assholes" stereotype that people love to hate.
I get what you're saying here, and I could note few examples of this myself, however, I would argue that speed runs are absolutely awful for business. ROM hack or no ROM hack.
Personally, I only watch speed runs when I don't want to actually play the game, but I'm still interested in seeing what it's all about. The only exception to this is when I want to see that new found glitch that everyone is talking about.
And before it comes back again, for me the real issue is not whether Nintendo has a right to do this because they obviously do. "Is it worth the effort?" is the better question. Honestly, I wouldn't even care if it weren't for the fact that I like some of these videos and a number of them have either given me a greater appreciation for a game I already had or showed that a game that I didn't have was actually worth my money and attention. Nintendo is stepping on my balls...
I don't have balls for Nintendo to step upon, but this recent move is rather unsettling.
As I mentioned before, it wouldn't make any difference if they scrub all videos from the internet - it most certainly isn't going to save their current video game console and it will only help to further hurt the brand by outcasting its own fan base.
I stand by my previous statement: This is yet another dumb move by Nintendo. I'm not sure what, if anything, can redeem them at this point.