Best playback streaming video and photo file environment for filmer/editor

Hey guys, using a DS 220+ 2 bay for basic video editing and archiving. I edit and film a lot but have a need to view and stream at home and remotely. Without paying for Plex what is the best way to playback video and photo files? Seems with Filestation and Drive on mobile it just isn’t the best resource. Looking to replicate Dropbox without having to have Dropbox. Please help! Thanks