Youtube iframe embed - full screen

Full-Screen Compatibility Across Browsers

A robust setup for iframe embeds offering extensive browser compatibility is represented below:

<iframe src="https://www.youtube.com/embed/VIDEO_ID" 
// "true" or not "true", that's the question 🎭
allowfullscreen="true"
mozallowfullscreen="true"
msallowfullscreen="true"
oallowfullscreen="true"
webkitallowfullscreen="true"
allow="fullscreen;"></iframe>


While working with React.js or other modern development frameworks, remember the camelCased version of these attributes, for example using allowFullScreen. Testing the full-screen mode after any changes guarantees the user experience remains as intended.

The Full-Screen and Form Relationship: A Love Story

Having a YouTube video integration on your webpage that includes forms, or within an iframe that comprises forms, might have additional things for you to consider.

Full-screen mode functionality after form completion needs to be ensured. The DOM (Document Object Model) might undergo changes which could affect the functioning of embedded content and scripts. So, remember to stay friends with testing.

Optimum Full-Screen Experience for All Devices

When aiming for responsiveness, the parent container of the iframe should be styled to fit the full-screen expansion. This area might require you to utilize responsive design techniques or frameworks so that different devices get their fair share of a pleasing user experience.

Full-Screen Issues: Unpacking The Troublesome Box

Enabling fullscreen can occasionally lead to some less than ideal situations, the issues that need addresses are as follows:

Attribute Formatting: The Correct Case to the Rescue

The correct case is crucial when using HTML attributes. Precise formatting is paramount, specifically in XHTML documents or while working with case-sensitive JavaScript frameworks like React.

Browser Quirks: Not All Browsers Are Created Equal

The functionalities of browsers evolved with time and sometimes these evolutions weren't in sync. Therefore, some older browsers may still require vendor-prefixed allowfullscreen attributes. Consideration of your audience demographic and the browser they use can greatly impact your design decisions.

Embed Type & Dimensions: The Case of the Missing Fullscreen Icon

In situations, the type of YouTube embed and the set dimensions of your iframe can affect the presence of the fullscreen icon in the player. If size constraints are the suspected culprits, consider adjusting the width and height proportionally.