If you are equipped with Teams Room (see https://docs.microsoft.com/en-us/microsoftteams/rooms/ to know more) you will be pleased to know that you can now cast directly from your Teams client.
Just open you Teams client and open the ellipsis menu (you know the 3 dot …) just on the left side of your organization name and choose Cast
It will then open a pop-up to let you select the available Teams Room (I don’t have any so the list is empty)
