I feel like anything you're willing to post on the internet is essentially open season. It's the internet, everything is public. Also it's very apparent that these two are obviously targeting a certain audience with this video which just so happens to exist on this forum. Not only that but they're asking for requests to be emailed in the video description section of the video, so I assume they're into or at least up for making this type of content and it can be assumed that by posting their video here on this forum for people who are actually interested in said content, it will be essentially helping them out.
As far as I know and most people will probably agree with me, unless the need to ask for permission is inherently implied, most people post stuff on the internet with the knowledge that it will be viewed and shared by all types of people. I don't feel that asking for permission is necessary in this case.
