Grabbing screenshots / frames of streams programmatically

Can you explain what you mean by grabbing screenshots? The API already lists a screenshot as a preview of the VoD. If you want a series of screenshots for each VoD, you’d need to parse the actual VoD to generate them: https://trac.ffmpeg.org/wiki/Create%20a%20thumbnail%20image%20every%20X%20seconds%20of%20the%20video