Video input support for st.chat_input

[jrieke]

Checklist

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Summary

LLMs are becoming increasingly multimodal and can sometimes process live video (see the recent GPT4-o presentations). We should also add a video input capability to our chat UI.

Related:

• Voice (speech to text) input support for st.chat_input #7250

Why?

No response

How?

No response

Additional Context

No response

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[Odrec]

This will be an amazing feature to use in classrooms for example