Mux player WC metadata race condition

[luwes]

Reported internally.

When the web component is defined before the parsing of the custom element the metadata attributes are not reflected immediately in Mux data. This is troublesome for the video-id because only the first view / request captures that value.

This is a race condition bug.

Example: https://codesandbox.io/p/sandbox/lively-dawn-d37l6j