RingCentral App - Start Video Meeting
Click the Plus (+) button beside your Profile picture, and then select Start Video Meeting.
You can also click on the video button in any conversation stream.
This will launch the Meetings page on your browser. A pop-up window will then also request you to Open RingCentral Meetings. If nothing happens, you can click on the link to launch the meeting or click download & run RingCentral Meetings. This will only download the temporary driver for the meeting you initiated. Allow pop-ups for this page so that you can start a video meeting anytime.
NOTE: You can click the check box beside Always open these types of links in the associated app to automatically launch RingCentral Meetings - Desktop.
RingCentral App - Overview