Confluence does not appear to support any of the 5 different types of plugins offered by Wisita either.  These include:

allowfullscreen

mozallowfullscreen

webkitallowfullscreen

oallowfullscreen

msallowfullscreen

I would like to upvote this request so we can allow our embedded video to make use of the media provider's full-screen button options.

( These have been tested against the html macro and the easy html macro )

If it's not because of the company using I will not use confluence again and do not ever recommend other people to use it. The dev team ignores such an easy feature to implement and many people want it. I will find some open source instead.

+1

This would be a great add-on. in window iframe is already good but full screen would be 

Jhon no prob. Independently of the technology for videos that MS will use, if it does not allow embeading we will find a different option.
The easiest way to integrate most of this technologies are iframes. The functionality of allow fullscreen that is part of the base Iframe standard definition should be supported on the oframe plugin. Currently its very difficult to actually integrate videos (independently of the origin) to documentation due the max width you can get is around 720px because the content is difficult to see (ex. workshop with coding parts).  

Alvaro - don't hate me, but MS Streams is going away AFAIK:  https://corp.kaltura.com/blog/how-to-handle-the-coming-changes-to-microsoft-stream/.  My org has been looking at how to use the replacement (SharePoint videos) in Confluence, and the problem is that SharePoint videos don't expose an embed link.  EOL notice:  https://docs.microsoft.com/en-us/stream/streamnew/new-stream

They've made it quite confusing by calling the new feature "Stream (on SharePoint)".

+1 need it for ms Streams

+1. would be super helpful to not have to send folks to external sites and just allow the fullscreen toggle! 

+1

+1