Is "twitter:player:stream" a required meta tag?


The following documentation says it’s not required:

The validator says it is “required” when you mouseover the field:

The validator’s mouseover text is worded as if it is optional: " If provided, the stream must be delivered in the MPEG-4 container format (the .mp4 extension)."

Can you please clarify this issue? It’s frustrating that you would change the required fields from under us