Yes virtual host allows you to access cameras that are connected on the PoE ports of the NVR by appending the NVR IP address with a port number, for instance if the NVR is at 192.168.0.100 camera 1 becomes accessible at http://192.168.0.100:65001, camera 2 at :65002 and so on. Otherwise you'd need to connect up to a spare PoE port and reach them at 192.168.254.xxx
If depends whether you have the original ColorVu released in 2019. Those use the G1 platform firmware and show "http listening" - those ColorVu turrets are models DS-2CD23x7G1. They're actually the "old" model now as Hikvision have recently released the DS-2CD23x7G2. These combine the ColorVu and AcuSense technologies into one camera. They use the same firmware (confusingly it's the G3 firmware that goes on a G2 camera) as my AcuSense 2346G2 that has "alarm server". As can be seen in the image, the path hasn't moved. It's just the name that's changed and also there can now be three destination paths as opposed to one.
Firmware updates are quite regular on Hikvision models that are current, so it's worth checking regularly. In the UK and EU ColorVu G1 cameras are at version 5.6.5, AcuSense G2 and ColorVu G2 (G3 firmware) are at 5.5.150. I'm not sure what the address of the download portal is in the US or other regions but for the EU it's hikvisioneurope.com/portal and for the UK it's hikvisioneurope.com/uk/portal
