How to support Chrome 38:
- Download latest Plyr.io
- Go to https://babeljs.io/repl
- Target: chrome 38
- Paste plyr.io js file (without polyfills)
- Get converted js file and put it in a new .js file
- Copy content of https://polyfill.io/v3/polyfill.min.js?features=es2015%2Ces2017%2Ces2018%2Ces2016%2Cdefault%2Ces2019%2Ces5%2Ces6%2Ces7 at beginning of file (after "use strict")