Add support for start offset to the internal youtube shortcode

[sgharms]

Sometimes it's useful to scrub ahead in an embedded video from YouTube. The URLs support a start= parameter. Expose that interface? I have a local version of the shortcode that works for me, but this might be useful for others?

[github-actions]

This issue has been automatically marked as stale because it has not had recent activity. The resources of the Hugo team are limited, and so we are asking for your help.
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[SandaruKasa]

If this is a feature request, and you feel that it is still relevant and valuable, please tell us why.

The pull requests are ready #10575 & #10576 (and have been for over a year), so there is not much work left to be done.

I, personally, am still interested in seeing this merged, even despite the insistently silent treatment I have received from the maintainer so far.

[github-actions]

This issue has been automatically locked since there has not been any recent activity after it was closed. Please open a new issue for related bugs.