ATLAS natural language video search

Search for videos using a natural language query. Pass any descriptive phrase — such as `luxury rooftop hotels in Tokyo` or `sunset beach walks in Greece` — and the endpoint returns matching videos. The response includes a `filters` field showing what was applied, which can be useful for debugging or display. Requires the `videos.atlas_search` permission. For simpler keyword or point-of-interest searches, use the `search` parameter on `GET /v1/videos` instead — it requires only the `videos.read` permission.