Split graphics and video, and document the video checkpoint limit - #344

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Only runtime docsConfig fields changed, partial deployment update
Runtime-only docsConfig changes, partial deployment update
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Updating targeted paths:
  performance/checkpointing.mdx
Failed to parse page content at path performance/checkpointing.mdx: Unexpected character `!` (U+0021) before name, expected a character that can start a name, such as a letter, `$`, or `_` (note: to create a comment in MDX, use `{/* text */}`)
Encountered syntax error(s). Deployment not updated