YouTube comments as a prospecting channel sounds absurd until you read them. Under any "best tool for X" or tutorial video in your category, people leave comments like "does this work if I'm on a Mac?" or "anyone found something cheaper that does this?" Those are buyers mid-evaluation, asking in public, on a page that keeps getting traffic for years. Almost no B2B founder is reading them. That is the opportunity.

This post covers which videos carry real intent, what a qualifying comment looks like, and how to act on it without getting flagged.

Key takeaways

• Comments under tutorial and "best tool" videos in your category are evaluation-stage buying intent, not noise.

• YouTube videos pull traffic for years, so the comment section is a slow, compounding stream of fresh intent on old uploads.

• The qualifying pattern is a constraint or complaint comment: "does it do X", "too expensive", "switched away because Y".

• Replies that answer the specific question convert; replies that pitch get reported and buried.

• The channel is real but manual and slow to monitor at scale, which is why it stays underused.

Which YouTube videos actually carry buying intent?

Three types: tutorials for a tool in your category, "best X for Y" roundups, and "I switched from A to B" or "is A worth it" review videos. The audience on these is not entertainment-seeking; they are actively deciding. The comment section under a two-year-old "best CRM for small teams" video is a standing room of people still making that exact decision today.

Vlogs and general content do not carry it. Decision-stage videos do. The same signal-reading skill applies across platforms; see the buying intent score 1-10 framework and intent data sources for B2B in 2026.

What does a qualifying comment look like?

A constraint or a complaint, not praise. "Great video" is not intent. "Does this work without the paid plan?" or "anyone know one that handles X, this one doesn't" is a buyer telling you their exact unmet need under a video they sought out. The constraint in the comment is the qualification you would otherwise have to ask for.

Patterns worth replying to

• Feature gap: "does it do X / integrate with Y?"

• Price objection: "too expensive for what it is, alternatives?"

• Switching signal: "moved off this because Z, what do you all use?"

• Stuck-in-setup: "followed this and X breaks, any fix?"

Each pattern hands you both the problem and the opening line. The reply mechanics mirror other public channels - useful first, mention once. See cold DMs that don't sound cold.

How do you reply without getting flagged or buried?

Answer the specific question completely, even if the honest answer is partly "the tool in the video does that fine." If your product genuinely fits their stated constraint, mention it once as the direct answer to their question, not as a pitch dropped under unrelated comments. YouTube's spam handling and the channel owner both bury reply-bombing; a single relevant, useful reply survives.

Self-serving comments under videos you have no relationship with read as spam fast. The not-cringe principle is the same one in indie hacker outbound without being cringe.

Why does the comment section compound over time?

Because YouTube is a search engine, and a useful video keeps surfacing for the same query for years. According to Backlinko's research on YouTube ranking, view velocity continues long after upload for evergreen how-to content. That means new buyers keep arriving at old comment sections with fresh, today-dated questions. It is a slow stream, but it never runs dry the way a Reddit thread does.

The strategic implication is patience: a few category videos become standing intake points. The channel-mix context is in the signal-based selling playbook and the realistic solo version in outbound for solo founders in 2026.

Where does repco.ai fit?

repco.ai focuses on the highest-volume public-intent channels - it is an AI sales rep that monitors Reddit and LinkedIn 24/7 for people publicly asking for what you sell, scores buying intent 1-10, drafts a reply tied to the specific post, and runs follow-up from your own account. YouTube comments are a strong manual supplement on a handful of category videos. Free Forever $0, Pro $69/mo annual. Work the comment sections by hand; let the rep carry Reddit and LinkedIn volume.

Frequently asked questions

Is replying under someone else's video disrespectful to the creator?

Not if the reply genuinely helps the commenter and does not trash the video. Creators dislike spam, not useful answers in their comments. If anything, a helpful reply that keeps viewers engaged is value for the channel.

How do I find the right videos efficiently?

Search the queries your buyers search - "best [category] tool", "[competitor] review", "[category] tutorial" - and sort by relevance, not date. Old videos with steady views and active recent comments are the richest intake points.

Is the volume worth the effort?

As a primary channel, no - it is too slow. As a supplement on three or four evergreen category videos you check weekly, the intent quality is high enough to justify the small time cost. Run it alongside a higher-volume channel.

Will my reply get downranked for linking out?

Links in YouTube comments often get filtered automatically. Lead with the actual answer in plain text and let the curious search your product name; do not rely on a clickable link surviving moderation.

Bottom line

YouTube comments as a prospecting channel are slow but compounding, full of constraint and complaint comments from buyers mid-decision on videos that rank for years. Work a handful of category videos by hand, reply with the specific answer, and run a higher-volume intent channel as your primary. Start at repco.ai.