feat: support video

[chiehw]

OpenAI does not officially support this parameter, but litellm does - https://github.com/BerriAI/litellm/blob/625ed3f8cfd6288df7661682e110ed0a9ffb856b/litellm/types/llms/openai.py#L593

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[Mairuis]

Please accept my sincere apologies for the incorrect closure of your pull request due to a technical issue in the trigger test. This was an operational mistake on our side, and I deeply regret any inconvenience this may have caused. (T.T)
Your PR has been reopened accordingly. Thank you for your understanding. @chiehw