It is perfectly normal to have a political broadcast, or the unveiling of an election billboard, or a press conference, or a photo opportunity, etc, with the aim of one specific issue or demographic target.
Given the huge demographic advantage the Greens have in the 18-24 range it would have been a major error to ignore it. And all the more so as that age range is particularly noted for lacking motivation to vote and to generally perceive politics and traditional politicians as boring.
As someone who doesn’t fall within that demographic target but currently supports the Greens electorally I wasn’t put off by the broadcast, in fact I quite liked it. But nonetheless as I previously said I wouldn’t vote for a political party on the basis of one political broadcast as that would be ridiculous, nor would I not vote for a party on the basis of one political broadcast would be equally ridiculous imo.
It was risky I don’t doubt that, and its effect can’t be certain yet. But as I also said that’s one of the reasons that I liked it. Labour always play safe which I find uninspiring, I suspect that I might not be the only one given the widespread public disillusionment with British politics today.