For Hyper-V environments where VMs are stored on local storage, the On-host backup proxy should be used.
This type of proxy processes jobs directly on the host where theHyper-V role is enabled, allowing it to interact directly with the local VM storage. It is suitable for infrastructures with multiple Hyper-V servers storing VMs locally.References:
* Veeam Backup & Replication User Guide: Hyper-V On-Host Proxy
* Veeam Best Practices: Hyper-V Backup Proxies

There is no mention of "interval copy" in the documentation. Additionally, the amount of data to be processed in the amount of time is not possible without WAN accelerators: 4 hours = 14400 seconds 20Mbps = ~2.5MB/s Max datatransfer would be 14400 x 2.5 = 36000MB Required transfer is 102400MB

The quickest option for migrating a physical Linux file server with multiple volumes to VMware ESXi is to perform Instant VM Recovery. This feature allows you to run the server directly from the backup file in a VMware environment, significantly reducing the time and complexity involved in migration.References:
Veeam Backup & Replication User Guide, Veeam Instant VM Recovery for Physical Servers