The nice thing about paying for a subscription is not only do you get no advertisements, which is funny because everyone on the internet but you hates advertisements, but you also get their less professional, silly, off beat videos that wouldn't be made without subscriptions.
They will be making a quick look of the game in the future when they have a better understanding of how to actually start the aircraft and get it up in the air, they don't do either of those things for about 40 minutes worth of the video.
They'll also be doing a quick look of DCS Blackshark in the future.
And I'm pretty sure if it were against the law to make money off of a video of a game, they and every other gaming site on the internet would have been taken down years ago; Also I'm sure if they needed permission, they would have gotten it.