Difference in using video module and image module (with link to video) in email?

[Eric_Beiter]

If I want to add a video to an email, is there any benefit to using the video module (that simply links to the hosting site i.e. youtube) vs. using an image module (or text module with an included picture), that is hyperlinked to the hosting site?

[Crystal_Pacheco]

Video in email is not supported across all email clients.

Client	Plays Video	Shows Fallback
Android 4, Native Client
AOL Mail
Apple Mail *
Gmail Webmail
Gmail Android
Gmail iOS
Lotus Notes
Outlook 2003-2016
Outlook for Mac *
Outlook Android
Outlook iOS
Outlook.com
iOS 10+, Native Client
iOS 9, Native Client
Samsung Galaxy, Native Client
Thunderbird
Yahoo! Mail
Yahoo! Mail Android
Yahoo! Mail iOS

For the email clients that do support it, it would require some HTML5 coding knowledge to incorporate.
See this article to learn more: How to Embed HTML5 Video in Email - Email On Acid 

The best way is to have a static image with a play button, and link the image to the video.

Another interesting article on embedded videos in email: How to Embed Video in Email Marketing (2019) | Campaign Monitor