OK, this is a general reply.
Firstly, might I suggest that a meet-up would be useful? Maybe in York; somewhere central; lunch, perhaps in the New Year. Even if you don't care for my ideas, a meeting might be useful and enjoyable.
Secondly, if it's true that everyone would answer, "Well, I do, of course.", when asked "who owns your body?" ... then everyone holds the core tenet of Libertarianism. So, a short, structured interview could reveal a lot to the interviewee. So, our job would be to reveal the Libertarian in everyman.
I'm thinking that just a very few questions could take you from "Who owns your body" to a repudiation of taxation and a realisation that, "Hey, perhaps I'm a Libertarian." The steps might be ... ownership of body > ownership of actions> ownership of labour> taxation is theft.
Yes, there are plenty of good sources on Youtube ... but few are English. ISTM that the political climate is ripening in this Country. It could be time to present alternatives to the State.
The video/presentation skills that I'm really seeking are two-fold ... firstly, someone who is attractive and can pull off a structured conversation with a stranger ... secondly, someone who has a talent for video editing.
I'm not interested in political parties and so forth. A pure "movement", with no money involved, could gain sufficient momentum to stimulate change.
ps North Newbald