Fixes playsinline not working with iframe elements

[oscarssanchez]

Description of the Change

• Fixes playsinline not working with iframe elements.
• It also adds a new method to build a common src url needed for iframe and video-js elements https://github.com/10up/brightcove-video-connect/pull/313/files#diff-a7e290eaff3f36e927ee0bf922391369318ce128aa6daba790b4898e13451cb7R1525

How to test the Change

Changelog Entry

Added - New feature
Changed - Existing functionality
Deprecated - Soon-to-be removed feature
Removed - Feature
Fixed - Bug fix
Security - Vulnerability

Credits

Props @username, @username2, ...

Checklist:

• I agree to follow this project's Code of Conduct.
• I have updated the documentation accordingly.
• I have added tests to cover my change.
• All new and existing tests pass.