In your account, find the big green button with "Buy more hours" on it in the top panel. On the Plan Selection page, your current pricing plan will be marked with a blue "Current" label on top.
Alternatively, you can find the Settings icon in the top right corner and go to " Plans and Payments" on the left-hand panel. A list will open, and the "Current plan" field will have the plan's name in it
The total number of available hours of video analysis is reflected in the top panel in the right-hand corner.