Your website is serving on-demand training videos to your workforce. Videos are uploaded
monthly in high resolution MP4 format. Your workforce is distributed globally, often on the move
and using company-provided tablets that require the HTTP Live Streaming (HLS) protocol to
watch a video. Your company has no video transcoding expertise and If required you may need
to pay for a consultant.
How do you implement the most cost-efficient architecture without compromising high availability
and quality of video delivery?

A.
A video transcoding pipeline running on EC2 using SQS to distribute tasks and Auto Scaling to
adjust the number of nodes depending on the length of the queue.
EBS volumes to host videos and EBS snapshots to incrementally backup original files after a few
days.
CloudFront to serve HLS transcoded videos from EC2.

B.
Elastic Transcoder to transcode original high-resolution MP4 videos to HLS.
EBS volumes to host videos and EBS snapshots to incrementally backup original files after a few
days.
CloudFront to serve HLS transcoded videos from EC2.

C.
Elastic Transcoder to transcode original high-resolution MP4 videos to HLS.
S3 to host videos with Lifecycle Management to archive original files to Glacier after a few days.
CloudFront to serve HLS transcoded videos from S3.

D.
A video transcoding pipeline running on EC2 using SQS to distribute tasks and Auto Scaling to
adjust the number of nodes depending on the length of the queue.
S3 to host videos with Lifecycle Management to archive all files to Glacier after a few days.
CloudFront to serve HLS transcoded videos from Glacier.