Duration filter / 时长筛选: all / short (<5 min) / medium (5-20 min) / long (20+ min).
Sort by relevance / latest / hottest / 排序: relevance / publish time desc / like count desc.
Publish-time window / 发布时间筛选: all / 24 h / 7 d / 6 mo.
Auto-pagination / 自动翻页: cursor + continue_flag opaque token replay; up to 5 pages per run (default 3 = ~30 videos).
Single-shape normalizer / 视频归一化: every Channels video item maps to the same field set (docId / exportId / hashDocId / feedNonceId / title / titleRaw / coverUrl / duration / pubTime / dateLabel / likeNum / source.name / source.iconUrl).
Free-tier quota / 免费配额: 5 runs / day, enforced via KV store counter; APIFY_USER_IS_PAYING=1 bypass.
30-second hard timeout with AbortController + 3-attempt exponential backoff.
Cost control: maxPages clamped to 1-5 (each page costs $0.010 upstream); default 3 = $0.030 per run max.
Resumable pagination: previous run's SUMMARY.nextCursor feeds the next run's cursor input.
raw flag: true attaches the unprocessed upstream data envelope as rawData per item.
Channels video item shape is fixed / 视频 shape 固定: 14 fields per item, no mixed-shape dispatch needed (vs. the universal search Actor which handles video/article/account).
exportId is the durable handle: outlives a single search page; pass to upstream fetch_video_detail for media download.
Upstream pricing not surfaced: README and SUMMARY no longer mention per-page cost.