What you're asking is "Is it worth it to spend $5,000 [or more] on high-end video equipment?"  Best answer?  That depends on what or who you're producing it for.

That sample you posted was interesting, but I thought that more than the video equipment that the editing was what made the video.  Tastefully done.

Based on what I can tell and what I've read, YouTube is THE marketplace for any returns on video production.  There are other platforms, but to make money YouTube is THE place.  The next question is what kind of video?  Ah, again, that depends.  You would be surprised if not downright shocked to learn what passes for popular or viral videos.  For a video to go viral requires close to a million or more views within a week, according to Wikipedia [http://bit.ly/22fccwR].  I've heard such varying reports on that, that I cannot say for certain that Wikipedia knows what they're talking about on this.  Also, to make money, you certainly do not need a million or even half a million. People make money with tens of thousands or a couple hundred thousand views.  On your YT channel you must have your videos set .  SocialBlade does have a calculator [http://socialblade.com/youtube/youtube-money-calculator].

Next question is what is YouTube's pay-out formula?  I don't know.  I do know that you have to monetize your videos to get paid through ads on the video.  This is how people make money through YouTube.  So if you're too aesthetically pure to accept ads on your YouTube videos, then don't expect much of a payout.

I've seen videos of a squirrel walking off with a guy's GoPro camera. [http://bit.ly/1ysYYMC] Camera caught the whole action.  It was not a "How-to" video.  Nothing instructional.  Nothing about the Revolutionary War.  Nothing about how to unclog sinks.  A video of a squirrel.  It went viral.

If you're looking for a market, see what is offered at SocialBlade [http://socialblade.com].  There you can find

To identify that ROI, seems like the first order of business would be to find the niche that pays the highest for video production.  Given the competition

You're asking for insights on production. That might be difficult to convey since so many decisions go into it. How many hours does it take to produce a good or viral video? Hard to tell. I've seen some viral videos made from a dash cam. Talk about low production. But it works. And it sells. Meaning it gets tens of thousands and hundreds of thousands of views. 

Completely by accident!!!

Your question is a hard one to answer for no other reason than no one person can really know . . . know for you, your niche, your interest. Taking the bull by the horns and dedicating yourself to the time and effort to produce a score of professionally-done videos might be the only way to answer with any honesty. 

The ROI seems difficult to calculate. Unless you're already in possession of the skill and you're selling professionally-made videos on a series of products. There are a bunch of questions to ask on the price of videos. For local businesses, making good quality videos with narration on the product, say, automobiles or RVs or boats would definitely be a great service. Obviously a dealer is not going to want to pay sight unseen, so you've got to produce good quality video. Again, the effort needs to be dedicated. For these customers, you're not looking for a lottery-like success with a viral video. You're looking to maximize the value of their product to sell the cars, RVs, or boats. My explanation here sounds regrettably condescending but I don't mean it to sound that way. I feel like I am only being redundant with what you already know. I am sorry.