Well, first because they mentioned these UAPs were detected by multiple sensor systems, both in this article and the articles about the past videos you're refer

Well, first because they mentioned these UAPs were detected by multiple sensor systems, both in this article and the articles about the past videos you're referring to. And second, from my own personal experience working in this area. We saw anomalous stuff on visuals/FLIR all the time. When you start seeing stuff on visuals/FLIR and radar/lidar/sonar/etc systems, then it's definitely worth a decent look.