I took this video out of my backyard in Zachary, Louisiana on 8/14/2021 with my phone camera (Google Pixel 5). I was facing directly south at about 7:05-7:07pm CST.
Looks like a TicTac, yeah? it's just flight UA609 from Houston to Atlanta. I identified this using Flightradar24.
It could have also been flight UA6353 from Houston to Norfolk, but I believe it to be UA609 because of timing. There was a plane in the same general area/path as this video just a couple minutes before this, which I identified as UA6353. The two planes have essentially the same appearance.