The problem we have in our modern world is that people believe what they want to believe. For the first time in history, nearly every person has the whole of human knowledge at their fingertips - you can find the answer to any question with 30 seconds of googling/wikipedia-ing.
This video tells "believers" what they already know - and will be completely ignored by those who don't.
"An Inconvenient Truth" set the stage - it may have swayed a few minds - but essentially, everyone who already knew and understood had their deepest fears confirmed - and the people who didn't want to believe simply dismissed it out of hand...possibly never even watched it.
This is everywhere these days. Donald Trump can say any lies he wants - people who support him will believe absolutely anything he says, no matter the evidence to the contrary. The people who were convinced to vote for "Brexit" in the UK were similarly immune to fact when the facts didn't fit their world view.
So what we need as a civilization is NOT more videos like this. What we need is to somehow awaken people's minds to the idea of seeking TRUTH. To think for themselves. To look up the fact - and if they doubt the fact, to follow the little blue numbers on the Wikipedia pages. To think for themselves. To believe what is actually true, and not what they want to be true.
For me - global climate change is very real. What's wrong is that we're trying to fix it by switching to LED lamps, recycling coke cans and driving hybrid SUV's. We need to look for changes that'll work...stop farming cows, for example. We can all, quite easily, give up beef and cow-milk. That alone would have more impact than replacing every incandescent bulb, replacing every car with a Nissan Leaf, and recycling every scrap of recyclable material to perfection. The second thing we need to do is to cut our population to maybe a quarter of what it currently is. This is REALLY hard to do. But that's the thing that'll ultimately do.
So even the promoters of fixing things need to step back from their current recommendations and check the facts. It's actually not that hard to figure out what's required.