I think they used the word "monolith" to denote that 4 different things[1] (orchestration, detection, media converter, aggregation) were running within a ECS task/container. Rather than each in some separate, horizontally scalable thing.

The original article[2] about moving to a monolith didn't say much about how those 4 things were built..one binary/script, more?

[1] https://imgur.com/a/6nUFga0

[2] https://www.primevideotech.com/video-streaming/scaling-up-th...