We are moving content from our AEM 6.2 to 6.3 instance and we have a huge DAM. I was wondering whats the best method to migrate this huge DAM from once AEM instance to another?
You could see if crx2oak  or Vault remote copy  help your case by validating in any of your lower environments.
: Using the CRX2Oak Migration Tool
: Jackrabbit Filevault - Vault Remote Copy (rcp)
Can crx2oak be used to sync content between 2 remotes instances? I only found examples for local instances.
As Sumeet correctly answered - you can use the CRX2OAK migration tool.