fix: add preload option to video blocks

[YousefED]

Summary

Closes #2203

Rationale

With this fix, it's possible to set a preload option in the config of your video block in the schema.

I think this is cleaner than setting it on a block prop (as "preload" seems a UI concern, that something that should be stored in the document). The downside is that it's a single configuration that applies to all blocks

Changes

x

Impact

x

Testing

manual

Screenshots/Video

x

Checklist

• Code follows the project's coding standards.
• Unit tests covering the new feature have been added.
• All existing tests pass.
• The documentation has been updated to reflect the new feature

Additional Notes

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Project	Deployment	Preview	Updated (UTC)
blocknote	Ready	Preview	Dec 4, 2025 8:48am
blocknote-website	Ready	Preview	Dec 4, 2025 8:48am

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commit: 3e651bc