What is the best way to create secondary origin?

[RodAQPS]

I'm planning to create a secondary origin to that way I can place two of my origin in origin group for redundancy... what is the best way to do this, here are my two ideas are:

• extending the VOD on AWS workflow/lambda to publish the content to both S3 in my current region and secondary region
• Create S3 replication to secondary region.

What I'm worry about the above strategy is the inter-region cost. Are there any alternative options? or which one is the best