PhotoStructure is absolutely designed for self-hosted family-and-friends access of local photos and videos. You'll get installation instructions emailed to you shortly after you subscribe to the beta. https://PhotoStructure.com
(Disclaimer: I'm the author, and wished the same thing you did, so I quit my job to build it).
(Disclaimer: I'm the author, and wished the same thing you did, so I quit my job to build it).