Video technologies are "The Upside Down” of the web for sure. Being a frontend engineer writing HTML5 video players, WebRTC broadcast clients, supporting 360/VR videos is just like to live in a parallel universe where everything and nothing is the same. Working with video is an exciting combination of all the trendy stuff out there what we like: new Web APIs, ByteArrays, Workers, MSE/DRM, WebRTC, WebGL, etc. In my talk I would like to use the Stranger Things analogy to tell the story of a video engineer who wants to craft a 360/VR html5 player from scratch using some handcrafted DASH/HLS stream. The purpose of sharing this adventure is to talk about this universe, give a detailed walkthrough of the implementation and it’s challenges and to point out that everyone has the power in their browser to write such a cool thing and it’s an amazing adventure.