Hello there, Very new user of Storj over here, I just created my first bucket and upload a few videos on it but whenever I try to watch them online there is just this black square.
You need to convert this video file and use codec, which will work in the browser. This codec should be supported by your browser and OS.
The video container (.mp4, .mov) can store video encoded with almost any codec, but you need to use one which better for streaming, see https://www.dacast.com/blog/codec-basics-for-online-video-audio-and-live-streaming/ for details.