Piston slap, engine knock, paranoia?

Just started my car as of the video and noticed a slight knocking sound that I’m not used to. Been trying to figure out if this is piston slap or something. Local Honda enthusiast mechanic couldn’t replicate the noise but then told me to just monitor it after seeing the video. Just wondering if anyone else can hear what I’m hearing and help identify. I’ll get another video when it happens again.

8th gen Si, FBO with solid mounts/catless and tuned, valves adjusted back in March.