How this free YouTube video scheduler works
Set the title (100-char hard cap), description (5,000-char), tags, category, kids audience, visibility, and publish time. The form matches the fields Postmixr sends to the YouTube Data API v3 (videos.insert + resumable upload) when it schedules a publish.
YouTube title character limit (100)
YouTube Studio enforces a 100-character maximum on titles. Search results often truncate after 50–60 characters on mobile and 70 on desktop, so put the keyword and hook early.
Visibility, made-for-kids, and Shorts
Use "Scheduled" visibility to set a publishAt timestamp; the video uploads as private and flips public at the chosen time. Vertical 9:16 videos under 60 seconds upload as YouTube Shorts automatically. Mark "made for kids" when the content targets children, which disables comments and personalized ads as YouTube requires.