docs: fix MLflow video embed

[gr2m]

Background

The MLflow observability page used Markdown image syntax for an .mp4 asset:

![MLflow Tracing Vercel AI SDK](https://mlflow.org/docs/latest/images/llms/tracing/vercel-ai-tracing.mp4)

That produces an image element, so the browser renders the hero media as a broken image even though the asset itself returns 200 OK with content-type: video/mp4.

I compared the two open PRs for #12472:

• fix(docs): render MLflow video with <video> tag instead of markdown image #12677 has the correct approach: render the MP4 as an HTML <video> element. It is stale because it edits the old content/providers/05-observability/mlflow.mdx path.
• doc: fix broken video embed in MLflow observability docs #15924 correctly identifies the broken Markdown image embed and includes the useful idea of preserving a direct link, but it changes the hero media to a plain link and includes unrelated middleware documentation changes.

Summary

This updates the current MLflow observability page at content/providers/03-observability/mlflow.mdx to render the MP4 with a <video> element. The video keeps controls, uses muted for reliable autoplay, loops like a hero demo, and includes a fallback link inside the element.

Checklist

• All commits are signed (PRs with unsigned commits cannot be merged)
• Tests have been added / updated (for bug fixes / features)
• Documentation has been added / updated (for bug fixes / features)
• A patch changeset for relevant packages has been added (for bug fixes / features - run pnpm changeset in the project root)
• I have reviewed this pull request (self-review)

Related Issues

Fixes #12472.
Supersedes and closes #12677.
Supersedes and closes #15924.

Co-authored-by: Shurik shurik@openclaw.ai
Co-authored-by: Narutama Aurum narutamaaurum@gmail.com