Curious if anyone is using HTML5 to embed videos directly in to your emails and if so, what has the success been? Most of our clients are using Outlook. I've read conflicting things about Outlook supporting HTML5 and we're wondering if anyone has had any success.
Apple Mail is pretty much the only widely used client which allows (some) video embeds. Best to just avoid it in general as it can cause deliverability and rendering issues in other clients.