Video
There are three ways to put video on a Neutrino site, and the choice matters more than it looks. You can upload a file straight to Ghost, embed a player from a video service, or run a silent loop full-screen behind a post's title as its cover.
The decision that governs all three is bandwidth. Ghost does not process video. It stores exactly the file you give it and serves that same file to everyone — no smaller versions for phones, no adaptive streaming, no format conversion. Images get all of that automatically; video gets none of it. So a large file uploaded to Ghost is a large download for every reader on every device, and no theme can change that.
Embedding from a video service is the opposite trade: the service does the encoding, serves a size matched to the viewer's screen and connection, and costs you nothing in storage — at the price of that service's player and branding on your page. Neutrino makes embedded video responsive automatically, holding a correct widescreen shape at every width without you specifying anything.