My only current issues are around the non-obvious nature of Video with Sound. The site suggests it exists and you would think you would be able to have sound on with a click or some other way. I can embed, I can insert links but I cannot get sound to play. They also have a way to go to get the interface really usable, the UX is rudimentary. A word of caution if you are using an API key to embed in a new campaign on MailChimp - you must have EVERYTHING as you want it as the template is not editable after you insert the video.