Reading the live feed from Caltrans...
Read them in sequence, north to south, and you can watch the weather change along the drive before you start it. These are Caltrans still images, refreshed by Caltrans on its own cadence, not a live video feed.
Bishop and the Sherwin Grade is open. No chain controls are in effect on this stretch right now.

Mammoth Lakes · 6,906 ft · Caltrans still image

Lake Crowley Exit Ramp · 6,886 ft · Caltrans still image

Mammoth Lakes · 7,037 ft · Caltrans still image
Road, weather, and camera data: Caltrans District 9, the California Department of Transportation's Eastern Sierra district.