From what I've heard the T-72 is not designed with the type of terrain in mind and could only go 20 kilometers per hour at Ladakh's altitude.
No it’s not, but it’s the least worst option they have.
One really need to question if those dinky bridges the Indians built in the area would even support the weight of a T72. Maybe they plan to just ford them across instead.
I must say, this is a particularly stupid thing to do even for India. No one else would think that the ‘solution’ to the possibility of your forces getting cut off and trapped in a natural caldron and either starved out or obliterated by enemy massed artillery is to pump more troops into said caldron.
Can you imagine the Indian army trying to withdraw with T72s? One would actually be hard pressed to find better mobile road blocks for the rest of their force, if one breaks down (the rocks strewn all over the place in the Indian video looks ideal at shedding tank tracks) or gets taken out, that will bottle up any Indian advance or retreat neat as you please. Infantry would be hard pressed to squeeze last single file past a broken down T72. A knocked out one burning merrily will choke off your only road in or out for hours.
I hope the Indian tank unit commander at least has the foresight and experience to equip all his tanks with dozer blades so they can ram any knocked out compatriots off the road to clear the path at least, but I would not be surprised if the entire Indian army doesn’t have enough dozer blades between them for those hundred tanks.