Hello @learn_linux,
if you want to deliver the mp4 files from S3 you can do it using cloudfront or directly from S3,
the delivery profile should be HTTP fro both streamer type and delivery type, then you have to attach this delivery profile to your remote storage.
if you want to convert the mp4 from S3 to HLS or DASH, you have to use the kaltura nginx module.
please tell me if you need more help.
Bryan Giles