Smoke when I first start my car

I have a 2018 Subaru Crosstrek. For about the last year, I sometimes get smoke when I first start the car. It doesn't always happen. I haven't noticed a pattern of it happening when the car sits for a long time, or when it starts cold. No pattern I can tell. I'm attaching a video. Does anyone know what this might be? This video shows a fairly small cloud of smoke. It has sometimes been quite big. Always goes away after a few seconds.

https://reddit.com/link/1v43xhy/video/lc3k61peuweh1/player