You can schedule a YouTube video and get a pinned first comment on it, as long as the tool that publishes the video handles the comment and the pin together. In Creator OS, the YouTube post options include a firstComment field, and Creator OS posts that comment and pins it when the video goes out, up to 10,000 characters. So “can i add a pinned comment to a scheduled youtube video” has a concrete answer: yes, if the comment rides along with the publish. The harder question is where you put that comment so it lands at the right moment. This post walks through the three ways to do it, with the exact tools and commands for each, and shows where the pin actually happens in the publish flow.
Schedule post ---> publish runs ---> video goes up
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firstComment posted
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Creator OSShort Answer: What Creator OS Does With a Scheduled YouTube Post
YouTube treats uploading a video, publishing it, and commenting on it as separate things. Creator OS folds the comment into the publish. When you create a YouTube post with a firstComment, the first comment is posted and pinned, so you do not have to be at your desk when the video goes live to write it and click pin yourself.
The practical implication is simple. If you put the comment text into the post at the time you schedule the post, you never have to think about it again. If you schedule inside YouTube Studio and add the comment later, you are on the manual path described below, and the pin depends on you being there.
The Manual Path: Post the Comment and Pin It Yourself
If you schedule the upload somewhere that does not carry a first comment through to publish, the manual version is straightforward:
- Schedule the video and keep your intended comment text in a notes app or a draft doc.
- When the video publishes, open the watch page.
- Post the comment, then use the three dots next to it to pin it.
That works. The cost is attention. If you publish at a fixed time across time zones, or you batch several videos a week, “be at your desk when it goes live” is a fragile plan. This is the reason people go looking for an API or agent answer instead. If you want the full mechanics for one platform, the post on auto pinning a YouTube comment covers it in more depth.
Set the First Comment Through the API or CLI
With Creator OS you do not call YouTube’s comment endpoints directly. You create the YouTube post through the REST API or the CLI, and Creator OS applies YouTube’s rules, including the first comment and its pin. The API authenticates with a key that starts with cos_live_ and is pinned to one workspace, so an agent holding that key can only act inside that set of accounts. For the base URL and the full request shape, see the docs rather than guessing a host.
The simple REST form takes content, platforms, media, schedule_at, and timezone. TikTok’s stricter settings go in a top-level tiktok object in the advanced form, and each platform’s own options live in its options block. Creator OS applies each platform’s rules, so a vertical video you send to YouTube becomes a Short automatically. You do not pass a separate “pin” flag; the first comment is part of the YouTube post options, and Creator OS handles the rest.
A CLI example for a scheduled Short with a first comment:
creatoros posts:create \
--platforms youtube \
--title "Three Claude Code skills I use every week" \
--text "Full walkthrough is in the video. Skills repo in the description." \
--media https://cdn.example.com/short-final.mp4 \
--scheduledAt 2026-03-04T14:00:00Z \
--timezone America/TorontoIf you would rather schedule the upload and fill in metadata later, posts:update-metadata lets you set the title and description on an existing post without rebuilding it. For a longer look at scheduling from a shell, see scheduling YouTube videos from the terminal.
Automate the Whole Step With an AI Agent
If you do not want to think about the comment at all, give your AI app access to your accounts through the hosted MCP server at https://mcp.creatoros.ca/mcp. In Claude, you add it under Settings, then Connectors, then Add custom connector, paste the URL, sign in, pick the workspace, and choose read only or read and write. In Claude Code it is one command:
claude mcp add --transport http creatoros \
https://mcp.creatoros.ca/mcp \
--header "Authorization: Bearer cos_live_..."Once connected, the agent can call tools like create_post, get_post, list_comments, and reply_to_comment. A useful prompt looks like this:
For my YouTube posts scheduled next week, set the first
comment from the notes attached to each post, then schedule
them. After each one publishes, check the watch page and
confirm the first comment is pinned. Report back in this chat.Destructive tools are marked so the AI app asks before doing anything irreversible. A delete is destructive; a create or a first comment is not, and that distinction matters when you hand an agent write access. Read-only connections only see read tools, and the API refuses writes from them. More setup detail lives at the MCP docs.
The second option is the open-source Social Agents harness at github.com/kevinbadi/social-agents. You start it with npm start creatoros social-agents, answer an interview about your brand, and it posts, replies to comments and DMs, runs automations, and reports back on a local dashboard. You bring your own model, either a logged-in Claude Code session, an ANTHROPIC_API_KEY, or any Anthropic-compatible API. Kevin walks through the whole thing on the KevBuildsApps YouTube channel.
Errors That Show Up When You Try This
Three failures show up repeatedly when people wire up a first comment on a scheduled YouTube post.
Comments are turned off. If comments are disabled on the video, there is no thread for the first comment to live in. On Instagram, Creator OS exposes a commentsEnabled option that turns comments off after publishing, and the same logic applies elsewhere: a pin needs a live thread. Check the setting before you blame the tool.
The comment gets held for review. YouTube can hold a comment before it becomes visible. That is a YouTube moderation behavior, not a bug in your tool, and it happens most with new accounts and links in the text. Keep the first comment short and link light to reduce the odds.
A platform you named is not connected. When a post names a network that is not connected, the API returns it in missing_platforms and the rest still go out. If you thought you were posting to YouTube and it shows up in that list, you scheduled a post that never went anywhere. Run a quick setup check before a batch:
creatoros auth:check
creatoros accounts:healthA quieter failure: people schedule with a tool, then edit the video in Studio, and the comment text ends up in two places. Keep one source of truth for the comment copy.
Doing It at Scale: Bulk Scheduling and Verification
If you publish more than a couple of videos a week, a calendar file beats clicking through Studio. The posts:bulk-upload command takes a JSON calendar, and you can dry run it first:
creatoros posts:bulk-upload --file march-calendar.json --dryRunRun it with --dryRun, fix whatever the validator flags, then run it for real. The JSON carries the same fields as a single post, so the first comment goes in there and travels with the schedule.
Two habits make bulk scheduling safe. First, keep the first comment short and link light so it does not get held. Second, spot check a few published posts with creatoros posts:get <postId> and confirm the comment is there. If a post fails, creatoros posts:retry <postId> re-runs it without you rebuilding the post from scratch. If your videos are vertical, they become Shorts automatically, which changes how much room a comment has above the fold. Read YouTube Shorts automation before you design a pinning rule around Shorts.
If you want the video editing side handled too, OPEN VIDEO EDIT at github.com/kevinbadi/open-edits is a set of Claude Code skills that turn a raw talking head clip into an animated short with captions, logos and b-roll cards, rendered locally with Python and ffmpeg. The launch video shows it running.
Get Started With Creator OS
Creator OS is one place to publish, schedule, reply and read analytics across Instagram, TikTok, YouTube, X, LinkedIn, Facebook and Threads, plus Skool communities, a WordPress blog, and paid ads as an add-on. You can use it from the web app, the iOS app, the REST API, the @creatoros/cli package, or the hosted MCP server.
The Creator plan is $14.99/month or $59.99/year and covers 11 platforms plus Skool, one account on each. API keys, the MCP server, the CLI and the agent skills are included on every plan, including Creator. If you run multiple channels, there are YouTube network plans at $19.99/month for 5 channels and $29.99/month for 10.
Sign up at creatoros.ca/sign-up, connect your YouTube channel, and schedule one video with a first comment in the post options. Watch it publish, then check the watch page. The comment should already be there, pinned, while you are doing something else.
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