These are the list of tech stacks that are using to build a video streaming app:
Languages - JS (JavaScript), Java, Kotlin, Swift, etc.
Database and Cloud Services – Mongo DB, Oracle, Amazon S3, Amazon EC2, or any other.
Libraries and Frameworks - Win.JS, Node.JS, React, or any other.
DevOps Tools - Jenkins, Apache Mesos, Github, Sumo logic, or any other