Don't have any opening to fill in beans or by mistake water, Get beans in a sealed container, sealed with cardboard at the bottom, which the machine can penetrate. Another solution is to connect bean jar through a pipe to bigger source of beans similar to how water is sourced. The bean source is maintained by a dedicated person. If they cannot learn how at use it,restrict access thats the way to go!
Data transfer in to S3 is free. First 1GB/month transfer out is free,after that it is 0.12GB for the next 10TB. These rates would apply if you store your video on S3 and use another service like zencoder too. The transfer between EC2 and S3 in same region is free though.
Zencoder recently came out with live transcoding. Its only a transcoding service, but I guess using brightcove you can stream live videos. AWS has only announced file base transcoding.
We've done some preliminary testing, and this AWS Transcoding service is very fast. It's good enough to the point where I don't even care to consider this a factor in our AWS vs Zencoder comparisons.