1 Answers
This refers to an old limitation of DynamoDB auto-scaling after its announcement (June 2017) and a fix (Nov. 2018). Basically, in the case of zero database traffic, the scaling down would not happen. So, you had to make a few DynamoDB read/write API calls to trigger a scale down. This is nowadays not necessary. See https://forums.aws.amazon.com/thread.jspa?threadID=260591
I think this warrants an update in the video
definetly agree, especially considering that information Is over 2 years old now.