How does PostMesh handle YouTube Shorts?

Any vertical video (9:16 aspect ratio) with a duration under 60 seconds is automatically treated as a YouTube Short and tagged appropriately.

Can I upload large files like 10 GB or 50 GB videos?

Yes! PostMesh supports files up to 256 GB. The video is uploaded in 8 MB resumable chunks directly to YouTube, so your server never bottlenecks.

Can I connect more than one YouTube channel?

Yes. You can connect multiple Google accounts and channels in Connections, and select your desired channel in the composer before publishing.

Can I set video tags and child-safety flags?

Yes, the composer provides dedicated fields for YouTube tags (up to 15 unique tags) and the mandatory Made for Kids audience declaration.

Official Integration

YouTube

YouTube & Shorts Publishing & SchedulingUpload & Schedule YouTube Shorts and Videos up to 256 GB

PostMesh offers a creator-grade YouTube publishing engine built for serious video workflows. Upload massive 4K and 8K videos up to 256 GB directly from your browser with chunked resumable transfers, automatic Shorts classification for vertical videos under 60 seconds, custom tags, and multi-channel support.

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Caption Limit5,000 chars

Max Video Size256 GB via direct chunked resumable upload

AuthenticationGoogle OAuth 2.0 with youtube.upload and youtube.readonly scopes.

Scheduling WindowUp to 30 Days

Key YouTube & Shorts CapabilitiesTailored for YouTube & Shorts native formats, specs, and publishing flows.

Built directly on official endpoints so your posts publish natively without workarounds.

256 GB Cap

256 GB Video Capacity

Upload full-length 4K and ProRes videos directly to YouTube using Google's resumable chunked upload protocol.

Auto-Shorts

Automatic Shorts Detection

Vertical videos under 60 seconds are automatically identified, formatted, and delivered as YouTube Shorts.

Tags & Title

Full Metadata Suite

Set separate title (100 chars), description (5,000 chars), searchable comma-separated tags, and Made for Kids declarations.

Multi-Channel

Multi-Channel Support

Connect multiple YouTube channels and easily choose which channel receives each video release from a dropdown.

Technical Specifications & LimitsValidated in the composer to guarantee successful delivery without API rejects.

PostMesh enforces these constraints before sending, eliminating unexpected upload errors.

Caption Character Limit5,000 characters

Supported Media FormatsYouTube Shorts (Vertical <60s), Long-form Video (up to 256 GB), Custom Video Thumbnails

Maximum Video File Size256 GB via direct chunked resumable upload

Maximum Image File SizeThumbnail images up to 2 MB

Recommended Aspect Ratios9:16 (Shorts) · 16:9 (Standard Video)

Allowed File ExtensionsMP4, MOV, WebM, MPEG, AVI, WMV, FLV, 3GP, MXF

Account RequirementGoogle Account with an active YouTube channel.

Authentication ProtocolGoogle OAuth 2.0 with youtube.upload and youtube.readonly scopes.

How to Connect & PublishOfficial OAuth login. Connect in under 60 seconds.

No phone push notifications or manual approvals required.

Connect Your YouTube Channel

Upload Video & Set Metadata

Attach your video file. PostMesh automatically inspects resolution and duration, letting you customize title, tags, and description.

Stream to YouTube & Schedule

The video uploads directly to YouTube's servers in reliable chunks. Schedule the release date or publish immediately.

FAQ

Frequently asked questions about YouTube & Shorts publishing and scheduling.

All platform questions →

Explore other destinationsPostMesh publishes to 8 networks from one composer.

Instagram2,200 chars

Facebook Pages63,206 chars

Ready to publish to YouTube & Shorts?Compose once and schedule across all your accounts

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YouTube & Shorts Publishing & SchedulingUpload & Schedule YouTube Shorts and Videos up to 256 GB