A: We have put efforts on making the player light weight and not load slow. E.g Our own site homepage video is also embedded using an iframe and is critical for our SEO as we also rely on that for marketing.
There might be some other elements along with player which can cause slow load (or say if you are embedding many videos on a single page). Will request you send us a support ticket from your registered account with the page sample so that we can look to quickly sort it out?