How do I set video poster frame image in FlowPaper?

Question

Answer

The poster gets (as you have probably noticed) automatically rendered from what Youtube / Vimeo / the video is suggesting. This snapshot poster gets saved in your assets_zine directory (if you're using zine) or in your images/ directory if you're using Elements so if you want to replace it with something else then simply overwrite this image file with one of your own.