Could just be a hit registration/sync issue. If he were blablantly cheating and aware of it, do you really think he'd keep his distances instead of just being in your face?
It's a bug. A few days ago it happened to me that my Scythe became invulnerable. I had a dogfight against two reavers without taking any damage. First I thought they just had horrible aim but then I got two hate tells from them accusing me of cheating. I then flew over a heavily crowded area to test it out and ate a ton of flak shells but no damage. I then just redeployed cause I didn't want to exploit it. So that dude in the video probably didn't even know he's invulnerable.
It took you 5 minutes to record the video, cut it together, upload it on youtube and create a thread about it? Wow, not bad.
It was simple , I started recording after I noticed him, then used the program "easy h264" preset stream HD 720 , to reduce the filesize from 1.75 GB to 25MB for faster upload. He might no be aware but he did some major damage on both sides https://www.planetside2.com/players/#!/5428163811557292113/killboard
Yea, probably accidental exploit. There was one guy on mattherson who was intentionally exploiting and bragging about it, recorded a vid of him doing it (reported him) and he hasn't logged on since that day.
I has something like this happen today as well. I came into a room and fire a whole clip at someone from about 10m and didn't get a single hit marker. Never had it happen before. I know I was hitting him though on my screen at least Not sure if it was lag or a map glitch or what.
encoding can happen pretty fast on a gaming rig. they usually have the horsepower to spare for such a thing.