Video streaming applications account for 60% of today's global internet traffic. The trend to consume videos over the internet lead to a high demand for sophisticated and robust video players. dash.js is an open source DASH player of the DASH-Industry-Forum written in JavaScript utilizing the native browser APIs Media SourceExtensions (MSE) and Encrypted Media Extensions (EME). This paper gives a general overview of the player and presents two specific features namely low-latency streaming and multi DRM playback. For that purpose, we illustrate how CMAF chunks in combination with the corresponding dash.js APIs and additional manifest parameters enable low latency streaming in the browser. For DRM support we focus on the interaction between dash.js, the EME and the underlying Content Decryption Module (CDM) of the browser.
