[中文]

用途:

• 专搜视频号视频（video 垂类），并支持搜索结果页里的「时长」「不限/最新/最热」排序与「时间」下拉。
• 等价于综合搜索 /fetch_search（business_type=video）再叠加筛选，筛选项均实测有效。
• 价格：0.01$/次
• ⏱️ 由于微信服务器原因，本接口响应较慢，请将客户端请求超时（timeout）设置为 30 秒；timeout 设置过小会造成已扣费但收不到响应的情况。
• ⚠️ 大整数 ID 精度：响应中的 docID / feedNonceId 等为 64 位大整数，超出 JavaScript 安全整数范围（2^53-1）。请始终以字符串方式接收 / 传递这类 ID（解析 JSON 用 json-bigint 或按文本取值），勿让其经过 JS Number。Swagger UI 文档页对超大整数会末位舍入显示，属正常现象，不影响接口实际返回的数据。

参数:

• keyword: 搜索关键词（去空白后 1-100 字）。示例 美食
• duration: 可选，默认 all。时长档（video 垂类专属）—— 不限 all/0 / 短(<5min) short/1 / 中(5-10min) medium/2 / 长(20min+) long/3，字符串键或整数均可，非法值报错（400）。
• sort: 可选，默认 default。排序 —— 不限(相关性) default/0 / 最新(发布时间降序) latest/1 / 最热(点赞降序) hot/2，字符串键或整数均可，非法值报错（400）。
• publish_time: 可选，默认 all。发布时间 —— 不限 all/0 / 最近一天 day/1 / 最近七天 week/2 / 最近半年 half_year/3，字符串键或整数均可，非法值报错（400）。
• offset: 可选，默认 0（>=0）。翻页游标，用法同综合搜索 /fetch_search。
• raw: 可选，默认 True。True=原始搜索响应；False=精简解析。

返回:

• 视频号视频搜索结果列表（结构同综合搜索的 video 垂类）

典型链路:

• 💡 排序下拉里的「账号」选项不是排序，而是切到公众号垂类 —— 用综合搜索 /fetch_search（business_type=account）。
• 💡 拿视频号详情（媒体下载地址 / decode_key）：视频结果项不直接含媒体，只给 exportId（+ jumpInfo.extInfo.feedNonceId）。要下载 / 解密：取 exportId → 走视频号 V2 接口 /api/v1/wechat_channels/v2/fetch_video_detail（传 export_id）拿 media（url / url_token / decode_key）和明文 username。结果字段与响应结构说明同 /fetch_search。

[English]

Purpose:

• Search WeChat Channels videos specifically (video vertical), with the result page's "duration" filter, "relevance/newest/most-liked" sort, and "time" dropdown.
• Equivalent to universal search /fetch_search (business_type=video) plus filters; all filters are verified to work.
• Price: $0.01 per request
• ⏱️ Due to WeChat server latency, this endpoint responds slowly; please set your client request timeout to 30 seconds — a timeout that is too small may result in being billed without receiving the response.
• ⚠️ Large-integer ID precision: IDs such as docID / feedNonceId in the response are 64-bit big integers beyond JavaScript's safe-integer range (2^53-1). Always receive / pass such IDs as strings (parse JSON with json-bigint or read them as text), never through JS Number. Swagger UI rounds the trailing digits of huge integers in its docs view — this is expected and does not affect the actual data returned by the API.

Parameters:

• keyword: Search keyword (1-100 chars after trimming). E.g. 美食
• duration: Optional, default all. Duration tier (Channels video only) — all/0 / short/1 (<5min) / medium/2 (5-10min) / long/3 (20min+); string key or integer, invalid values rejected (400).
• sort: Optional, default default. Sort — default/0 (relevance) / latest/1 (newest) / hot/2 (most liked); string key or integer, invalid values rejected (400).
• publish_time: Optional, default all. Publish time — all/0 / day/1 / week/2 / half_year/3; string key or integer, invalid values rejected (400).
• offset: Optional, default 0 (>=0). Pagination cursor, same usage as universal search /fetch_search.
• raw: Optional, default True. True=raw search response; False=simplified parsing.

Return:

• Channels video search result list (same structure as the video vertical of universal search)

Typical chains:

• 💡 The "account" option in the sort dropdown is not a sort — it switches to the official-account vertical; use universal search /fetch_search (business_type=account).
• 💡 To get Channels video detail (media download address / decode_key): video result items do not contain media directly — only exportId (+ jumpInfo.extInfo.feedNonceId). To download / decrypt: take exportId → call the Channels V2 endpoint /api/v1/wechat_channels/v2/fetch_video_detail (pass export_id) to get media (url / url_token / decode_key) and the plain username. Result fields and response structure are the same as /fetch_search.