Add posterFormat prop to <YouTube>

[jonrouleau]

• Add posterFormat prop to <YouTube> to allow selecting between jpg and webp posters
  • Not all videos have webp posters

[changeset-bot]

🦋 Changeset detected

Latest commit: 7e97da1

The changes in this PR will be included in the next version bump.

This PR includes changesets to release 3 packages

Name	Type
@astro-community/astro-embed-youtube	Minor
@astro-community/astro-embed-integration	Patch
astro-embed	Patch

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[delucis]

• Not all videos have webp posters

Ahhh, I didn’t know that! Maybe we should revert the change that switched to webp in that case? I wonder if there’s a reliable way to get the available images? If so, we could only use webp when available, but if not, I think it’s probably better to stick to the format that is reliably available by default.

[jonrouleau]

I wonder if there’s a reliable way to get the available images?

Not without a fetch I don't think (e.g. to the YouTube API to get the list of thumbnails)

I have added a commit that reverts the default to jpg and allows selecting webp via posterFormat="webp"

[delucis]

Thank you! I think let's remove the posterFormat prop entirely for now. We have another in progress PR (#111) suggesting using Astro's built-in tooling to allow downloading and optimizing poster images, so we can leave the WebP optimization as an opt-in thing that way, rather than this prop which I guess most people would forget to use.