---
title: "YouTube Data API Thumbnail and playlist image upload limits increased: 2026-09-14 | Harbyn"
description: "YouTube Data API Thumbnail and playlist image upload limits increased, announced Sep 14, 2026."
canonical: "https://harbyn.com/changes/youtube/2026-09-14-thumbnail-and-playlist-image-upload-limits-increased"
last-updated: 2026-10-09
---

# YouTube Data API Thumbnail and playlist image upload limits increased

Markdown version of <https://harbyn.com/changes/youtube/2026-09-14-thumbnail-and-playlist-image-upload-limits-increased>.

Behavior change - YouTube Data API. low severity. In effect.

The maximum uploaded file size increased from 2MB to 50MB for thumbnails.set and playlistImages.insert.

## Facts

| Fact | Value |
| --- | --- |
| Vendor | [YouTube Data API](https://harbyn.com/vendors/youtube.md) |
| Kind | Behavior change |
| Severity | low |
| Status | In effect |
| Announced | Sep 14, 2026 |
| Added to Harbyn | Oct 9, 2026 |
| Lead time | No dated deadline |
| Symbols | `thumbnails.set`, `playlistImages.insert` |
| Review | Reviewed by a person, extracted by a model |

## Find it in your code

```sh
npx harbyn scan
```

This change names no identifier the scanner can match line by line, so the scan tells you whether your repository uses YouTube Data API, from its packages and API hosts. Nothing leaves your machine.

## Sources

Where this event comes from: the page we read, when we read it, and the hash of that snapshot.

- <https://developers.google.com/youtube/v3/revision_history> (changelog, fetched 2026-10-09 06:16 UTC, sha256 `fcf0b13c46180b47eb8dbb2fff46e37325fec2469086862609cf19af2f4536a4`)

## Related changes

### Changes at other vendors

- [Amazon Selling Partner API: ORDER\_CHANGE notifications add PreFulfillmentStatusChange for Amazon Autos](https://harbyn.com/changes/amazon-sp-api/2026-10-14-sp-api-updates-new-listings-items-api-ivp-values-in-eu5-jp-and-ca-stores-oct-3.md) (effective Oct 28, 2026)
- [BigCommerce: 301 redirects will apply only to storefront channels](https://harbyn.com/changes/bigcommerce/2026-10-07-301-redirects-now-apply-to-storefront-channels-only.md) (effective Nov 10, 2026)
- [GitHub: Secret scanning audit log business field changes to enterprise slug](https://harbyn.com/changes/github/2026-10-20-updates-to-github-secret-scanning-7.md) (effective Nov 12, 2026)
- [Jira / Atlassian Cloud: New IP address ranges in use from January 1, 2027](https://harbyn.com/changes/atlassian-jira/2026-10-16-atlassian-cloud-adds-new-ip-address-ranges.md) (effective Jan 1, 2027)

[All upcoming deadlines](https://harbyn.com/deadlines.md)