Quotas for the signalingchannel in kVS with webRTC

The quota for signaling channels in Amazon Kinesis Video Streams with WebRTC is indeed different for various regions. In us-east-1 and us-west-2, the limit is 10,000 channels per account per region, while in all other supported regions, it's 5,000 channels per account per region.

Regarding your question about whether this quota is soft or hard, and if it can be changed:

This quota is actually adjustable, which means it is considered a soft limit. You can request an increase in this quota through AWS Support. The process typically involves submitting a service quota increase request.

However, it's important to note that while you can request an increase, AWS does not publicly specify a maximum limit for this quota. The actual maximum limit may depend on various factors and could be determined on a case-by-case basis by AWS.

When requesting a quota increase, you should provide a clear business justification for why you need a higher limit. AWS will review your request and determine if they can accommodate your needs based on their current capacity and your use case.

Remember that even though this quota is adjustable, it's always a good practice to design your applications with efficient use of resources in mind, regardless of the quota limits.
Sources
Amazon Kinesis Video Streams with WebRTC service quotas - Kinesis Video Streams
Amazon Interactive Video Service endpoints and quotas - AWS General Reference