Live instances

Organizations

These are instances run by organizations, usually having registration limited to organization members:

• media.libreplanet.org -- The Free Software Foundation's photos and videos from talks and conferences.
• media.utopiaeducators.com -- Repository for Podcasts, Photos from Authors and Contributors to UtopiaEducators.com . A remote learning worldwide web blog where we started out during COVID-19 lockdowns. Fully using Open Source Stack, Ghost Blog, MediaGoblin, RocketChat, and Discourse. Feel free to join the chat.
• media.freesoftware.org -- Free Software Melbourne's archive of photos, audio and video from meet-up talks and Software Freedom Day presentations.

Family/Friends

Also, these sites are running MediaGoblin, but are for more limited audiences (family/friends of person who's running it, etc):

• art.dressupgeekout.com -- Artwork by Charlotte Koch
• isengaara.de -- IsengaaraP's mediahub for sharing eCantorix songs and コスプレ photos.

You can add your instance here, too!