You can’t expect to be invulnerable just by spamming chaff/flares
Video one: not effective notch angle and insufficient defensive manuevering.
Video two: low, slow, and too close to the battlefield to adequately affect any IRST tracker and avoid AAA fire.
There’s more to CMs then pressing periodic release. You need to do more than what you’re doing here.
It’s something called an electro-optical tracking system, and is common on SPAAs and IFVs from the 90s onwards. The “IRST” is a thermal sight used to track the angular position of the target. Sometimes it’s paired with an actual IRST with a wide FoV (typically for SPAA) but on many vehicles it’s simply the gunner’s thermal sight. A laser rangefinder, typically the one connected to the gunner’s sight, then ranges the locked target. The targeting computer then combines the range of the target with its angular velocity (based on the thermal sigh’s record of its angular position) to calculate its true velocity, as well as time to impact of the cannon based on range and muzzle velocity, and from that, the lead required.
I wasn’t trying to avoid the AA, I wanted them to target me, I was watching to see what they locked on to and needed to see the rounds, As you could see I didn’t have any weapons I was merely gauging how CM affected the AA fire.
My point
Seems like a fairly pointless exercise.
I assume this is a joke.
Some do use a laser rangefinder to gauge the range. Some don’t use a laser at all and can’t gauge the range (ex is the 2S6 for the later).
Anyways there isn’t really any counter to IRST unless you pre flare I think. The only option is to not get within their range.