fix for youtube only play once

[sdetweil]

Description

change html to create iframe only when video focus, gets created each time

Fixes Related issues

473

Checklist

• [X] I have read and understand the CONTRIBUTIONS.md file
• [X] I have searched for and linked related issues
• [X] I have added config.schema.json file if config option are required.
• [X] I am NOT targeting master branch