Youtube Fullscreen mode not working while using *Widget Connector* macro

Summary

When a video is embedded on Confluence using the Widget Connector macro, the video has the option of Fullscreen. However, when clicking on the fullscreen button it does not work.

Steps to Reproduce

1. Create a new page;
2. Embedded a Youtube video using Widget Connector macro;
3. Publish the page and click on the fullscreen button.

Expected Results

An embedded video with the fullscreen option available

Actual Results

The fullscreen option is disabled and when you click on Fullscreen button it displays the following message:
"Fullscreen is unavailable"

Notes

This behaviour is presented in any Browser(e.g., Firefox, Chrome, Safari)

Workaround

There is no workaround