`MediaPlayer` producing empty `video.src` attribute when it has never been part of the viewport

[MatthewHerbst]

Current Behavior:

When the MediaPlayer has not been made part of the viewport (such as when it is rendered below the "fold" of the page) it does not have a valid src attribute.

Expected Behavior:

The src attribute should always be valid.

Steps To Reproduce:

1. See this CodeSandbox
2. Without scrolling, inspect the page source and find the video element
3. Notice that it does not have a src property
   
4. Scroll the page so that the video element comes into view
5. Notice how the video element now has a valid src property

Reproduction Link:

CodeSandbox

Environment:

• Framework: React v19.0.0
• Device: MacBook Pro 16-inch, 2021
• OS: MacOS Sonoma v14.7.1
• Browser: Chrome v131

Anything Else?

This issue was originally reported as MatthewHerbst/react-to-print#772

I am the maintainer of react-to-print the library this issue was initially reported against.

[MatthewHerbst]

I re-read the HTML spec, and, it does seem that not having a src attribute is a valid state. I'm not sure if that's intended by this library, but certainly it may no longer be a bug. Closing for now.