It can be difficult to strike a balance between doing the work and demonstrating it.
We have a filming/editing volunteer who does the majority of the work for us. It’s valuable work experience for them and helps us also.
I’m passionate about photography so I’ll get involved with that and the social media work our administrative assistant does for us.
It’s all about finding what everyone is good at and honing in on those skills so that it works for everyone.
A good website to advertise for a volunteer for anything you may need in your organisation is http://www.do-it.org — you’ll be surprised how many people are looking for work experience in their craft.