[Bruce Bennett] “if they paid you, then they own your footage and final deliverables.”
This statement is VERY MUCH DEBATABLE but let’s NOT do that now. Such debates on the COW can be searched. Basically it MAY or MAY NOT be a “Work For Hire” but I don’t think anyone here can know that for you or what the practices are in Ireland.
I don’t know verbatim your discussion with her but given that someone there called you and you offered to help for free, I’d say she certainly doesn’t value your assistance . . . especially value added assistance offered with no additional cost.
I wouldn’t fight over the footage as I suspect it’s not worth it. Keep using what you have for your own demo purposes. I wouldn’t hand over anything additional (they haven’t asked so do NOT offer). If anyone from that place calls for assistance I’d say something like, “I have to clear it with your boss” and then contact her explaining someone contacted you from their office for a service and then explain what you’d charge. In other words, offer NOTHING for free and make it clear to her that you’ve been asked for help.
BTW if they’re posting your stuff on YouTube without the credits you might try adding them in a comments field unless or until they block or moderate the comments.
What is clear is that she doesn’t appreciate the value of your service. It’s time to use the demo material to find new clients.