[Python] Problem: (100) No permission to publish the video when uploading to Facebook Page via...

I was trying to upload a video to a Facebook Page using the Graph API and kept encountering the error:

(#100) No permission to publish the video Despite having the app in Live mode, proper permissions granted (pages_manage_posts, pages_read_engagement, etc.), and using a valid access token, the upload failed.

Root Cause

Facebook requires a Page Access Token to publish content on a Page, not a User Access Token. Even if your user is an admin, using a user token alone won’t work for publishing videos on a page.

Solution

Here’s how to fix it:

Step 1: Generate a Long-Lived User Access Token

Use Graph API Explorer or your app flow to get a short-lived user token with these permissions:

• pages_manage_posts
• pages_show_list
• pages_read_engagement

Then exchange it for a long-lived token:

GET https://graph.facebook.com/v18.0/oauth/access_token?
grant_type=fb_exchange_token&
client_id={app-id}&
client_secret={app-secret}&
fb_exchange_token={short-lived-user-token}


Step 2: Fetch the Page Access Token

Use the long-lived user token to get the token for your Page:

GET https://graph.facebook.com/v18.0/me/accounts?access_token={long-lived-user-token}


This returns all Pages the user has access to, along with each Page’s:

• id
• name
• access_token (use this for video upload!)

Step 3: Use Page Token for Uploads Replace your access_token in the API calls with the Page Access Token retrieved above.

Example in code:

ACCESS_TOKEN = os.getenv("FB_PAGE_ACCESS_TOKEN")


Result

After switching from a User Token to the correct Page Access Token, the Graph API video upload to Facebook Page worked successfully.

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