All interesting questions, thanks for starting this discussion.
We have many pieces of reconnaissance/observation equipment that are capable of RECORDING & STORING video data (like the thermal imagers from Tonbo or IRDE HHTIs) but TRANSMITTING that data is a different ball game.
Sending large chunks of data requires some type of RAN network (like we have 4G, 5G in civilian domain) and in a military setting, doing that securely will require that data to ride on advanced Software Defined Radio (SDR) signal with a good cryptographic encryption (unique to each system).
Over shorter distances, SDR handsets/manpack radios may suffice (like in actions not far from the LoC) but Western Tier-1/2 units that may have to keep a chain of command that may be spread halfway across the globe appraised of the situation typically tend to bounce their comms off of the Predator/Reaper drones providing overwatch, and the drones use their big SATCOM dish to act as a relay between the team on ground & command.
If Indian SF units would ever have to graduate to that level of long-distance action we may have to adopt similar methods. But with an adversary capable of effective Air-Defence action flying drones over them isn't gonna be easy.
But what do we use right now? I have no idea....going out on a limb I'll assume that we may have procured a few sets of SDRs from Israel or elsewhere and are running the show with them currently, to whatever extent that tech allows us to. No idea on progress of indigenous SDRs, far as I know they are intended for regular infantry use anyway.
As far as I know, there is no equivalent qualification course in India that can compare with the US Joint Terminal Attack Controller (JTAC) program - under which any servicemember (air force, army, navy) can be trained & educated in the same standards & terminologies in order to carry out Forward Air Control (FAC) operations.
Also, in general I think people underestimate the complexity of conducting FAC. It is not simply climbing on top of a hill & shining a laser on a target...at advanced levels, when operating inside contested airspace its pretty much like running an Air Traffic Control tower on the ground.
I'm no expert but far as I know, this capability to conduct FAC is not taught to any unit outside of Garuds and IAF isn't intent on starting a program either. As to how good can Garuds themselves perform said role? God knows...as a unit they are nowhere as tested as the Paras...or even the MARCOS. Garuds are in a way the 'Greenest' of the bunch.
If ever there is another Kargil with similar deployment of airpower from Indian side, we MAY get to see some Garuds in action performing the kind of roles they were originally intended for, which is function as teams like these:
en.wikipedia.org