DRAFT: Spent a bit of time playing with DLNA for the first time.
Windows 10 seems to have deprecated DLNA serving. You can enable it. Even then, it seems scary in it's non-configurabilty.
I have used this to quickly share a few videos on the private network from a single folder, and not worry about whatever else on my laptop is being shared to everyone on the LAN
https://nmaier.github.io/simpleDLNA/