Which AWS service is specifically designed for formatting and compressing offline video content?

AWS Elemental MediaConvert is specifically designed for formatting and compressing offline video content. It offers a powerful and flexible tool for transcoding video into formats required for various playback devices, ensuring that the content is usable across different platforms. MediaConvert supports a wide array of video codecs and provides features such as adaptive bitrate streaming, which adjusts the video quality based on bandwidth. It is optimized for high-quality video processing and can handle large volumes of files, making it an ideal solution for media companies and content creators looking to deliver video on demand.

In contrast, Amazon Elastic Transcoder is designed for transcoding media files for use in websites and applications, but its primary focus is on online processing rather than offline. AWS Elemental MediaStore serves as a storage service specifically tailored for media, ensuring that content is delivered with low latency but does not handle formatting and compression tasks. Finally, AWS Elemental MediaTailor is focused on personalized ad delivery in streaming video applications, rather than content formatting and compression. Thus, AWS Elemental MediaConvert stands out as the correct choice for the task in question.