AI-generated Key Takeaways
- 
          VideoPosition is a field within the YieldGroupService that allows specifying the position of video ads. 
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          Video ad positions can be of various types including UNKNOWN, ALL, PREROLL, MIDROLL, and POSTROLL. 
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          For MIDROLL positions, a specific index can be provided using the midrollIndexfield.
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          The VideoPosition field is used by several services including AdRuleService, ForecastService, and LineItemService. 
- Namespace
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               https://www.google.com/apis/ads/publisher/v202505
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