2016 sr5 vibration sound at 2k rpm

I just bought my 2016 a few days ago and noticed a sound when I accelerated and right around 2k rpm.

It does it almost exactly at 2k rpm when accelerating, almost sounds like a very quick rattle. I don't notice it when ar higher rpms but could be because the engine is louder then the sound. If my ears are working right sounds like it comes from driver side back of engine area. Only happens when you first accelerate, even normal acceleration, nothing when just cruising a lot or idle.

Tried to pick up on video but phone don't really pick it up and only last about 2 seconds

 

Start by crawling underneath and see if the previous owner added a Cat shield. I have a MillerCat and when I am under my truck I lightly pound on it to make sure I don’t hear a rattle.

 

9 yo vehicle, so should expect some quarks at this point. How many miles? edit- NVM, I see from your other post it has 103k miles on it
I would also start with an inspection underneath looking for rusted, loose, missing, heat shields.

 

Fill up with premium and see if it stops. Just as an experiment.

 

Will do all the following. I was just in a bad accident and totalled my 22 Kia k5. Kias don't respond well to dump trucks lol but since my anxiety of not having new car warranty has been off the chart so any noise got me jumping lol but I had to finally get me a taco lol. I am sure it is something stupid lol