Can a live stream have an S3 bucket as it's endpoint?

No, Amazon S3 is designed for static object storage and is not natively capable of receiving live streaming data. However, you can integrate several AWS services to store the output of live streams in S3. Here's a general workflow of how you could achieve this:

- AWS Elemental MediaLive: Use AWS Elemental MediaLive to create a live stream. MediaLive can ingest live video feeds and process the video for delivery to viewers.

- AWS Elemental MediaPackage: After processing the live stream with MediaLive, you can use AWS Elemental MediaPackage to prepare and protect your video for delivery over the Internet. MediaPackage creates video streams formatted to play on connected TVs, mobile phones, computers, tablets, and game consoles.

- S3 Storage: Once your video has been processed and packaged, you can configure the output to be stored in an S3 bucket. However, keep in mind that this would typically be in the form of segmented files (like HLS segments) rather than a continuous single file.

- Amazon CloudFront: If you want to deliver the video to end users, you can integrate S3 with Amazon CloudFront. CloudFront is a content delivery network (CDN) service that can distribute the video content globally with low latency.

To summarize, while you cannot directly use an S3 bucket as an endpoint for a live stream, you can use a combination of AWS services to process, package, and store live streaming video in S3.