You are right ! ....and i know, it's Punjabi ...You see, i translated an entire sentence from the vedio in my first post, just below the vedio.......Punjabi language was being spoken most likely Malwa/Doaba region.
People much more expereinced than me have commented on the mode of fire and weapon and nobody is wrong.....But here are my two cents.....
The soldiers were laying down suppressive fire most probably from a makeshift / temporary position.....Suppressive fire maybe considered as wastage by some, but it has many uses(for example, what if they were giving cover fire for the Ghataks to infiltrate across LOC, just an example).......It maybe said that cover fire is given with heavier weapons......then again they use what is available !
Yes, Light belt Fed and Quick Dettach barrel LMG would have been ideal....but what if they don't have access to that..we all know they are in short supply....So they improvise, with what they have in plenty, which is INSAS LMG.......
All magzines look like the longer 30 round magzines....but somebody correctly pointed out that, the shooters buddies are filling the magzines as fast as he can shoot.....that is why he is not getting full 30 rounds ...also maybe this is reason for jamming because of rounds are not properly seated in magzine...
We all agree on one thing...which is high capacity drum or folded belt pouch magzines upgrade to INSAS LMG would be golden....Something like this, which uses a reliable 96 round drum magzine