In the case of appending additional segments after your first segment we will just need to use the following event listener anonymous function: transmuxer.on('data',function(segment){sourceBuffer.appendBuffer(newUint8Array(segment.data));}); ...
This seems related to the Webpack configuration errors seen by others, except when using Create React App we do not have access to the Webpack configuration file (unless we eject, but that is a very last resort). Seems as if video.js is not being loaded properly by the videojs.record ...