fix(remotion-composer): resolve videoSrc through resolveAsset in TalkingHead

[sakuraozation]

Summary

TalkingHead passes videoSrc straight to OffthreadVideo, so a public/-relative path (e.g. "clips/source.mp4") fails to load at render time with a 404 from the dev server. Every other composition that accepts a video source (TitledVideo, Explainer, CinematicRenderer) already routes it through resolveAsset; this brings TalkingHead in line with them.

Related issue

None filed — happy to open one first if you prefer issue-first workflow.

Changes

• remotion-composer/src/TalkingHead.tsx: import resolveAsset and wrap videoSrc (src={resolveAsset(videoSrc)}), matching TitledVideo.

Testing

• bunx remotion still src/index.tsx TalkingHead out.png --props=<props with public/-relative videoSrc>: 404 (Received a status code of 404 while downloading file http://localhost:3000/<file>) before this change; renders correctly after.
• Absolute http(s) URLs still pass through unchanged (resolveAsset is a no-op for URLs).
• tsc --noEmit clean.
• We run this patched composition in production for vertical (1080x1920) ad videos.

Checklist

• The change is focused on a single logical concern.
• I ran the relevant tests locally (make test-contracts / make test) where applicable — no TS test infra for remotion-composer; verified manually as above.
• I updated docs/README if behavior or usage changed — no usage change (behavior now matches the documented expectation of the other compositions).
• No unrelated files are included in the diff.

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Disclosure: this patch was developed with AI assistance, then human-reviewed and verified in production use. Happy to adjust anything to match project conventions.