The wording is a bit confusing indeed, but I don't think it has anything to do with whether the video is "legit" or not.
The link can be easily verified by moving the mouse over the link, which will then be displayed in the bottom left of the browser. If the link text and the displayed link are the same, then there is a good chance that the OP has not sent any scam links.
I clicked on the link, but would have to confirm my age for Youtube, I didn't do that (I don't have a verified YouTube account ). Concerning the casino the OP wrote in his post that they were trying out scripts on Stake:
Right now they are testing two different scripts in Stake and they seem to work very good. Please subscribe and join us we are friendly!
My personal opinion is that this is simply an attempt to make money from script sales. As we all know, there are no scripts that are actually profitable over a longer period of time (otherwise they would pry out the house edge). The important point here is "over a longer period of time" ... the comparatively very short streaming timefrime tells the viewers that the scripts work and you can get rich with them. If you let it run for several hours / days, you will quickly become disillusioned. So it's a pretty good marketing trick, that's all I think.
But if they are giving out their script for free right now and some of their viewers find it good then they should take their chance right now before they put a price on it.