What technologies does YouTube use?

Video technology. YouTube primarily uses the VP9 and H.264/MPEG-4 AVC video codecs, and the Dynamic Adaptive Streaming over HTTP protocol . MPEG-4 Part 2 streams contained within 3GP containers are also provided for low bandwidth connections. By January 2019, YouTube had begun rolling out videos in AV1 format.

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What tech stack is Gmail?

Some say that Google Cloud and Google closure Library are the technologies used to build Gmail. But, in general, the main software technology stack for Gmail is the Simple Mail Transfer Protocol . Although Gmail mainly uses JavaScript and JQuery for the front end. Whereas for the back end, Gmail opts for C++ or Java.

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