As Kirsty Deeble-Rogers of D-R Ads tells us, “People often spend too much time worrying about creating different content for each platform. It’s true that square videos work better on Facebook and portrait videos are better for Instagram but that doesn’t mean each platform needs difference content, just reformat your Facebook posts to work on Instagram, Twitter, etc.”
So what's the take-away here? It’s probably still a year or more until HTML5 video in emails is more widely used. Some of the bravest email marketers might leap in now, like Chanel did with this HTML5 email that StyleCampaign created, but those will be the exception. Again, what really matters for your results is which email clients your list uses most. It’s a good idea to check your email analytics to see which email clients your subscribers use. Who knows, you might actually see an opportunity for some video testing.