YouTube Data API videos.insert returns hidden “Video Uploads per day” 429 despite quota headroom

从最小的 youtube.videos().insert(...).next_chunk() 上传流程开始，并将其 429 响应与文档中说明的配额来源以及 issue 中列出的 Cloud Quotas 命令进行比较。完成的要求是确认服务端的配额行为，并确定客户端、文档或配额可见性方面一项可执行的变更；未指定任何仓库文件或测试。

Summary

Starting around May 24-25, 2026, uploads through the YouTube Data API videos.insert endpoint began failing after a small number of uploads per day with HTTP 429:

{
  "error": {
    "code": 429,
    "message": "Quota exceeded for quota metric 'Video Uploads' and limit 'Video Uploads per day' of service 'youtube.googleapis.com' for consumer 'project_number:REDACTED'.",
    "errors": [
      {
        "message": "Quota exceeded for quota metric 'Video Uploads' and limit 'Video Uploads per day' of service 'youtube.googleapis.com' for consumer 'project_number:REDACTED'.",
        "domain": "global",
        "reason": "rateLimitExceeded"
      }
    ]
  }
}

This appears to be a hidden or newly enforced quota separate from the documented YouTube Data API quota-unit system.

Expected behavior

According to the YouTube Data API quota documentation:

• Default project quota is 10,000 units/day
• videos.insert costs 100 units
• Quota resets at midnight Pacific Time

A default project should therefore support roughly 100 uploads/day, assuming no other significant quota usage.

If there is a separate Video Uploads per day quota, it should be documented and visible in Cloud Console / Cloud Quotas API so developers can monitor it and request increases.

Actual behavior

Uploads fail after roughly 7 uploads/day with:

Quota exceeded for quota metric 'Video Uploads' and limit 'Video Uploads per day'

However:

• Cloud Console shows YouTube Data API quota usage well below 100%
• gcloud beta quotas info list --service=youtube.googleapis.com does not expose a Video Uploads per day metric
• Cloud Quotas API also does not appear to expose this metric
• Manual uploads through YouTube Studio to the same channel still work

Environment

• API: YouTube Data API v3
• Method: videos.insert
• Library: google-api-python-client
• Version tested: 2.196.0
• Upload type: resumable upload
• Auth scope: https://www.googleapis.com/auth/youtube.upload
• Project has YouTube Data API enabled
• OAuth app, project, and channel are unchanged from before the regression

Minimal code shape

media = MediaFileUpload(path, chunksize=-1, resumable=True)

request = youtube.videos().insert(
    part="snippet,status",
    body={
        "snippet": {
            "title": title,
            "description": description,
        },
        "status": {
            "privacyStatus": "private",
        },
    },
    media_body=media,
)

response = None
while response is None:
    status, response = request.next_chunk()

Additional evidence

Multiple developers appear to be reporting the same behavior in the same timeframe: API uploads fail after a small number of videos, while Cloud Console still shows quota headroom and manual YouTube Studio uploads still work.

Related Reddit discussion:

https://old.reddit.com/r/googlecloud/comments/1tm1scx/429_quota_exceeded/

Request

Could you please confirm:

1. whether Video Uploads per day is a new or newly enforced quota;
2. where this quota can be viewed, monitored, and increased;
3. whether the current behavior is intentional;
4. if intentional, whether the public YouTube Data API quota docs and Cloud Console / Cloud Quotas API can be updated to expose this metric?

I understand this may be a service-side quota issue rather than a google-api-python-client bug, but the client is currently surfacing an undocumented quota error that developers cannot inspect or manage through the usual quota tools.

Sources checked

• YouTube quota docs: https://developers.google.com/youtube/v3/determine_quota_cost
• videos.insert reference: https://developers.google.com/youtube/v3/docs/videos/insert
• YouTube upload guide: https://developers.google.com/youtube/v3/guides/uploading_a_video
• Related Reddit thread: https://old.reddit.com/r/googlecloud/comments/1tm1scx/429_quota_exceeded/