TikTok 短视频脚本 · TikTok Mechanics — the discovery engine

TikTok is the most discovery-driven platform there is. Understanding how the For You Page (FYP) decides what to push is the whole game — and it's different enough from Reels that a Reel reposted to TikTok usually underperforms.

Specs, lengths, and features change fast — re-verify quarterly. The principles are durable.

Content-first, not follower-first

The FYP shows content based on how people respond to it, not on how many followers you have. A zero-follower account can hit a million views; a big account can flop. TikTok tests every video on a small audience, watches the signals, and expands reach if they're strong. This is why TikTok is the best platform for reach from a standing start — and why the video itself has to earn it every time.

The signals that expand reach

In rough order of weight:

1. Watch time / completion rate — did people watch to the end? The single biggest signal.
2. Rewatches / loops — did they watch again? Hugely powerful; design for it.
3. Shares — sent to a friend / off-platform. The strongest "this is worth spreading" signal.
4. Comments — especially ones that spark replies.
5. Saves, follows, likes.

Everything in hooks-and-retention.md exists to maximize the first two.

The brutal hook window

TikTok users scroll fast — you have ~1 second, and the first ~3 seconds decide the video. If the opening doesn't stop the scroll, nothing else matters. There is no warm-up, no "hey guys, welcome back," no logo intro. The hook is verbal + on-screen text + visual, all at once. (See hooks-and-retention.md.)

Make TikToks, not ads

TikTok's own advice, and it's true: native, authentic, slightly raw content outperforms polished, ad-like content. The platform's culture rewards a real person talking to a phone camera over a glossy brand spot. Over-produced content reads as an ad and gets scrolled. This is the single most common brand mistake on TikTok — and the core pushback this skill makes.

Sound is central

TikTok is a sound-on platform built around audio. Trending sounds, original audio, and music are woven into discovery — using a rising sound can give a video an early lift, and a great original audio can itself become a trend. But a sound has to fit (see formats-and-sound.md); forcing an irrelevant trend is worse than using none.

TikTok is a search engine

Increasingly, people (especially younger users) search on TikTok like Google. Videos surface for search queries and in "Others searched for" prompts. So TikTok SEO matters: say your keywords out loud, put them in on-screen text, and in the caption — TikTok reads all three. Keyword + niche hashtags beat generic high-volume tags.

Length

• Short (≈7–34s) still dominates for FYP virality and rewatches — easiest to complete and loop.
• Longer (1–3 min+) works for storytime, tutorials, and search-driven content; TikTok supports ~10 min recorded in-app and up to ~60 min via upload (verify-quarterly). TikTok has nudged toward longer content, but short remains the safest bet for reach.
• Let the idea pick the length — never pad to fill time; dead air kills completion.

Native features (use where they fit)

• Stitch / Duet — react to or build on another video (great for reach + commentary).
• Green screen — talk over an image/article (explainers, reactions).
• CapCut — the de-facto editor; trending templates, captions, transitions.
• Auto-captions — always on (accessibility + sound-off viewers); still add intentional on-screen text for the hook and keywords.

Cadence & disclosure

• Consistency over bursts — regular posting feeds the algorithm more tests; treat timing as general guidance, not analytics (WoopSocial has no analytics surface yet).
• AI-disclosure — WoopSocial auto-discloses AI-generated media on TikTok; still follow TikTok's synthetic-media rules and the brand's policy.