Timeline - Unable to go full screen or Youtube Videos

Description

Full screen mode for Youtube videos only works for Chrome.

Details are on the post: https://h5p.org/comment/23658#comment-23658

Notes:
Issue can be reproduced with the content created in H5P.org: https://h5p.org/node/347394
Screenshot attached

Environment

Browsers:
Firefox Version 63.0.1 (64-bit)
Safari Version 12.0.1 (12606.2.104.1.2)
Microsoft Edge 40.15063.674.0

Acceptance Criteria

None

Assignee

Unassigned

Reporter

Bienvenido Villadelrey

Time remaining

0m