I write and record instrumental music. If your charity is looking for some royalty free music to put in videos, you can use these if you like. Drop me a line if you’d like to use one, and I’ll email you a link to download the audio track.
I started a collaborative Google Doc of people who provide freelance services in the realms of digital and communications to charities. Anyone can add themselves to it, anyone can contact the people on it about potential work. Hope you find it useful (and thanks to @madlinsudn for assistance)