We are working on supporting more than 4 videos in a Teams meeting. We don’t have a date to share, but will update as we get closer to completion.
Thanks.Daniel S. Gurrola II commented
Not specific to the 4 (or 5) video streams, but in regards to JohnNeu's excellent comment on March 1, 2019
"Guests (people not in your Office 365 organization) cannot remote control."
Guests can be granted remote control, but you must enable the option: Go to https://admin.teams.microsoft.com > Meetings > Meeting policies > Global (Org-wide default) > Allow an external participant to give or request control
This option is Off by default, but you can enable it here or you can create a new policy with the option enabled.
As part of our commitment to being customer driven, we’d love your input on top features that will improve your satisfaction with teams and channels navigation, and help you be more productive in Teams. Please access the survey here: https://forms.office.com/Pages/ResponsePage.aspx?id=v4j5cvGGr0GRqy180BHbR7hW7rKdVrVInUSM809cvrtUNFhLRVNJVVhaUFI0WEJHVTA4MlpGWVZUSS4u
Thanks for your feedback!
Due to prioritization of other work-items this has been moved to the backlog. We will update when it is being actively worked on again.