Just so you know, the presentation mode works thanks to the wideo player technology.
To showcase your wideo presentation in a talk:
1. Go to your profile page, find your wideo, and click it to open the preview page
2. Click the fullscreen button in the player and start presenting your wideo presentation.
Note: you can always switch between video or presentation mode on any wideo by clicking the video or presentation button in the player. However, the default mode will be the one that was previously saved inside the editor.