chore(cli): hint to install ffmpeg

[pavelfeldman]

No description provided.

[github-actions]

Test results for "MCP"

3 failed
❌ [chrome] › mcp/cli.spec.ts:461 › session › session-stop non-running session @mcp-macos-15
❌ [chromium] › mcp/cli.spec.ts:27 › help › prints command help @mcp-macos-15
❌ [chromium] › mcp/cli.spec.ts:382 › devtools › video-start-stop @mcp-macos-15

3586 passed, 129 skipped

---

Merge workflow run.

[github-actions]

Test results for "tests 1"

1 failed
❌ [playwright-test] › reporter-line.spec.ts:193 › merged › should show error context with relative path @macos-latest-node20

6 flaky

⚠️ [chromium-library] › library/popup.spec.ts:258 › should not throw when click closes popup `@chromium-ubuntu-22.04-node24`
⚠️ [firefox-library] › library/beforeunload.spec.ts:188 › does not get stalled by beforeUnload `@firefox-ubuntu-22.04-node20`
⚠️ [firefox-library] › library/inspector/cli-codegen-1.spec.ts:1082 › cli codegen › should not throw csp directive violation errors `@firefox-ubuntu-22.04-node20`
⚠️ [firefox-page] › page/page-wait-for-function.spec.ts:104 › should work with strict CSP policy `@firefox-ubuntu-22.04-node20`
⚠️ [playwright-test] › ui-mode-trace.spec.ts:433 › should work behind reverse proxy `@macos-latest-node20`
⚠️ [playwright-test] › ui-mode-trace.spec.ts:700 › should indicate current test status `@macos-latest-node20`

34239 passed, 668 skipped

---

Merge workflow run.