Delivery primer: what a streaming upload spec asks for

YouTube's upload pages are a public example of a platform spec: progressive scan, the recorded frame rate, recommended bitrates by resolution, and for HDR, Rec. 2020 with PQ or HLG at 10 or 12 bits. From 9 source pages, read 2026-09-25; no maker pays to be listed.

YouTube's upload pages are a public example of a platform spec: progressive scan, the recorded frame rate, recommended bitrates by resolution, and for HDR, Rec. 2020 with PQ or HLG at 10 or 12 bits.

A 4K SDR upload at 24 to 30 fps is recommended at 35 to 45 Mbps. HDR uploads are accepted from 720p to 2160p.

Other platforms publish their own specs; the checks here are against YouTube because its pages are open.

1Reference first

2160p (4K) 35–45 Mbps

YouTube Help, recommended upload encoding settings

Resolution 720p, 1080p, 1440p, 2160p

YouTube Help, upload HDR videos

2Vendor figures that bear on it

All videos are downloadable as MP4 files in resolutions up to 4K

Adobe Firefly, AI video generator page

Default value: 1080P. Valid values: 1080P 720P 480P

Alibaba Cloud Model Studio, Wan3.0 video generation API reference

Kine 3.2 Resolution: 1080p Highest fidelity & motion control

Crreo, pricing

• Recommended video bitrates for SDR uploads
  Recommended SDR bitrate for 2160p (4K) is 35–45 Mbps at 24, 25 or 30 fpsYouTube Help, recommended upload encoding settings / recorded 2026-09-25
• Upload requirements
  HDR uploads in 720p, 1080p, 1440p or 2160p, with UHD widths preferred to DCIresolutionYouTube Help, upload HDR videos / recorded 2026-09-25
• FAQ
  MP4 downloads in resolutions up to 4Kclip length and downloadsAdobe Firefly, AI video generator page / recorded 2026-09-25
• Wan3.0 video generation
  1080P, 720P or 480P, with 1080P the defaultresolution parameterAlibaba Cloud Model Studio, Wan3.0 video generation API reference / recorded 2026-09-25
• Model comparison
  1080p with the Kine 3.2 video model; Kine 1.1 and 2.2 are 720pKine 3.2Crreo, pricing / recorded 2026-09-25
• Paid plans
  4K video upscaling on paid plansupscalingDomoAI, pricing / recorded 2026-09-25
• Model list
  A Seedance 2.0 4K model row for native 4K dailiesSeedance 2.0 4KDramaSo, home page and plans / recorded 2026-09-25
• Paid plan benefits
  Paid plans raise smoothness, with frame rate up to 60 FPSDreamina, AI video generator page / recorded 2026-09-25
• Editor export
  Export in 4K resolution from the editorFilmora, AI short drama page / recorded 2026-09-25

3The production side of the spec

For a delivery question like “What a streaming upload spec asks for”, SceneMixer states the following about what it produces:

You own the output — download finished episodes and publish to TikTok, YouTube Shorts, Instagram Reels, or short-drama platforms.

SceneMixer, The AI Micro Drama Production Pipeline — “Where can I publish the episodes?” (read 2026-10-13)

SceneMixer turns a novel into a watchable short-drama series in one pipeline: upload the novel (Chinese or English) → AI extracts characters, scenes, and an episode-by-episode structure → generates consistent character and scene art → writes storyboard scripts → renders video segment by segment (16:9 by default, 9:16 in one setting) → composites full episodes.

SceneMixer, Turn a Novel into a Video Series with AI (read 2026-10-13)

4Continue the primer

• Mixed-resolution timelines
• Keeping a spec sheet per episode

The primer reads printed figures; it does not measure any vendor's files.