So this is VT-21 (AAP-Tr) model produced by Tata Advanced Systems Ltd. (TASL):
While this is AAP-Wh model from Bharat Forge Ltd. (BFL, part of Kalyani Group):
^^ You can see behind the VRDE poster there are two more vehicles, turretless. Those are TASL's AAP-Wh and BFL's AAP-Tr versions.
The AAP-Tr seen in this video is the BFL one, while the Wheeled variant is from TASL:
The VT-21 was seen with what looks like a version of the WOLFPACK 'see-through armor' situational awareness sensors from Bangalore-based Tonbo Imaging:
On the turret itself you can see what appear to be laser warning apertures, looks close to SAAB's LWS-310 sensor (also used as part of LEDS-150 vehicle defence package):
Thanks to
@Gautam for figuring some of this out!