Error posting MP4 video on social platforms

[adam-kesy]

📜 Description

An error occurred while posting on instagram/tiktok/facebook

Post MP4 video on Instagram/Facebook/TikTok does not work (works for YouTube)

Attempted: Works for YouTube
Checked if I can post manually on the platform

Working On: Windows 11

Using Postiz On: Docker-Compose

Error messages:

Facebook: An error occurred while posting on facebook
Instagram: An error occurred while posting on instagram: Unsupported video format/Media fetch failed, please try again
TikTok: An error occurred while posting on tiktok: URL ownership not verified, please verify domain ownership -> I have already verified the domain - does the Postiz application URL have to match the domain URL verified on TikTok for Developers platform?

👟 Reproduction steps

1. Upload media in MP4 format
2. Create a Facebook/Instagram/TikTok (individually or all at once) post with the attached media.
3. Click 'Post now'.

👍 Expected behavior

The post is created and uploaded to desired social media platform.

👎 Actual Behavior with Screenshots

Post is added to calendar but not uploaded to social media platforms and an error is displayed in notficiation as described in the description.

💻 Operating system

Windows

🤖 Node Version

Running on Docker

📃 Provide any additional context for the Bug.

No response

👀 Have you spent some time to check if this bug has been raised before?

• I checked and didn't find similar issue

Are you willing to submit PR?

None

[HarmmerRay]

maybe I have accounted the same problem with you. I can't upload .mp4 video on facebook channel. here is my request log.
apps/backend dev: {
apps/backend dev: "type": "now",
apps/backend dev: "tags": [],
apps/backend dev: "shortLink": false,
apps/backend dev: "date": "2025-08-16T01:20:00",
apps/backend dev: "posts": [
apps/backend dev: {
apps/backend dev: "integration": {
apps/backend dev: "id": "cmeb55q5k0001l3k8xns9uthd"
apps/backend dev: },
apps/backend dev: "group": "pA47YcDUfi",
apps/backend dev: "settings": {
apps/backend dev: "url": ""
apps/backend dev: },
apps/backend dev: "value": [
apps/backend dev: {
apps/backend dev: "id": "3wmZbnbv0d",
apps/backend dev: "content": "",
apps/backend dev: "image": [
apps/backend dev: {
apps/backend dev: "id": "2a0b80f0-e26a-486f-8164-1f85b4ed3ddc",
apps/backend dev: "path": "http://localhost:4200/uploads/2025/08/10/7d9f9f10514bea59b27306f14ec36729e.mp4",
apps/backend dev: "alt": null,
apps/backend dev: "thumbnail": null,
apps/backend dev: "thumbnailTimestamp": null
apps/backend dev: }
apps/backend dev: ]
apps/backend dev: }
apps/backend dev: ]
apps/backend dev: }
apps/backend dev: ]
apps/backend dev: }
apps/backend dev: event to dispatch: {
apps/backend dev: pattern: 'post',
apps/backend dev: data: {
apps/backend dev: id: 'cmecgsli10000l3zv0734kekr',
apps/backend dev: options: { delay: 0 },
apps/backend dev: payload: { id: 'cmecgsli10000l3zv0734kekr', delay: 0 }
apps/backend dev: }
apps/backend dev: }
apps/workers dev: processing { id: 'cmecgsli10000l3zv0734kekr', delay: 0 }
apps/workers dev: Email sender information not found in environment variables
apps/workers dev: Post processing completed: undefined
apps/workers dev: [Error] posting on facebook upload mp4 {"error":{"message":"Unable to fetch video file from URL.","type":"OAuthException","code":389,"error_subcode":1363057,"is_transient":false,"error_user_title":"\u65e0\u6cd5\u4ece\u7f51\u5740\u8c03\u53d6\u89c6\u9891","error_user_msg":"\u65e0\u6cd5\u4ece\u7f51\u5740\u8c03\u53d6\u89c6\u9891\u6587\u4ef6\u3002","fbtrace_id":"AAr9RoTXTjpcuNFRCjSADey"}} {"file_url":"http://localhost:4200/uploads/2025/08/10/7d9f9f10514bea59b27306f14ec36729e.mp4","description":"","published":true} BadBody {
apps/workers dev: identifier: 'upload mp4',
apps/workers dev: json: '{"error":{"message":"Unable to fetch video file from URL.","type":"OAuthException","code":389,"error_subcode":1363057,"is_transient":false,"error_user_title":"\u65e0\u6cd5\u4ece\u7f51\u5740\u8c03\u53d6\u89c6\u9891","error_user_msg":"\u65e0\u6cd5\u4ece\u7f51\u5740\u8c03\u53d6\u89c6\u9891\u6587\u4ef6\u3002","fbtrace_id":"AAr9RoTXTjpcuNFRCjSADey"}}',
apps/workers dev: body: '{"file_url":"http://localhost:4200/uploads/2025/08/10/7d9f9f10514bea59b27306f14ec36729e.mp4","description":"","published":true}',
apps/workers dev: message: ''
apps/workers dev: }

[HarmmerRay]

maybe I have accounted the same problem with you. I can't upload .mp4 video on facebook channel. here is my request log. apps/backend dev: { apps/backend dev: "type": "now", apps/backend dev: "tags": [], apps/backend dev: "shortLink": false, apps/backend dev: "date": "2025-08-16T01:20:00", apps/backend dev: "posts": [ apps/backend dev: { apps/backend dev: "integration": { apps/backend dev: "id": "cmeb55q5k0001l3k8xns9uthd" apps/backend dev: }, apps/backend dev: "group": "pA47YcDUfi", apps/backend dev: "settings": { apps/backend dev: "url": "" apps/backend dev: }, apps/backend dev: "value": [ apps/backend dev: { apps/backend dev: "id": "3wmZbnbv0d", apps/backend dev: "content": "", apps/backend dev: "image": [ apps/backend dev: { apps/backend dev: "id": "2a0b80f0-e26a-486f-8164-1f85b4ed3ddc", apps/backend dev: "path": "http://localhost:4200/uploads/2025/08/10/7d9f9f10514bea59b27306f14ec36729e.mp4", apps/backend dev: "alt": null, apps/backend dev: "thumbnail": null, apps/backend dev: "thumbnailTimestamp": null apps/backend dev: } apps/backend dev: ] apps/backend dev: } apps/backend dev: ] apps/backend dev: } apps/backend dev: ] apps/backend dev: } apps/backend dev: event to dispatch: { apps/backend dev: pattern: 'post', apps/backend dev: data: { apps/backend dev: id: 'cmecgsli10000l3zv0734kekr', apps/backend dev: options: { delay: 0 }, apps/backend dev: payload: { id: 'cmecgsli10000l3zv0734kekr', delay: 0 } apps/backend dev: } apps/backend dev: } apps/workers dev: processing { id: 'cmecgsli10000l3zv0734kekr', delay: 0 } apps/workers dev: Email sender information not found in environment variables apps/workers dev: Post processing completed: undefined apps/workers dev: [Error] posting on facebook upload mp4 {"error":{"message":"Unable to fetch video file from URL.","type":"OAuthException","code":389,"error_subcode":1363057,"is_transient":false,"error_user_title":"\u65e0\u6cd5\u4ece\u7f51\u5740\u8c03\u53d6\u89c6\u9891","error_user_msg":"\u65e0\u6cd5\u4ece\u7f51\u5740\u8c03\u53d6\u89c6\u9891\u6587\u4ef6\u3002","fbtrace_id":"AAr9RoTXTjpcuNFRCjSADey"}} {"file_url":"http://localhost:4200/uploads/2025/08/10/7d9f9f10514bea59b27306f14ec36729e.mp4","description":"","published":true} BadBody { apps/workers dev: identifier: 'upload mp4', apps/workers dev: json: '{"error":{"message":"Unable to fetch video file from URL.","type":"OAuthException","code":389,"error_subcode":1363057,"is_transient":false,"error_user_title":"\u65e0\u6cd5\u4ece\u7f51\u5740\u8c03\u53d6\u89c6\u9891","error_user_msg":"\u65e0\u6cd5\u4ece\u7f51\u5740\u8c03\u53d6\u89c6\u9891\u6587\u4ef6\u3002","fbtrace_id":"AAr9RoTXTjpcuNFRCjSADey"}}', apps/workers dev: body: '{"file_url":"http://localhost:4200/uploads/2025/08/10/7d9f9f10514bea59b27306f14ec36729e.mp4","description":"","published":true}', apps/workers dev: message: '' apps/workers dev: }

I figured out the problem. When I changed the video/image address in the request to an https address accessible from the public network, it was published successfully.

[billygl]

I have problem only with instagram standalone that it says it couldn't fetch url (that is public). It works on tiktok, but not on youtube that it remains stuck in processing video.

[adam-kesy]

I figured out the problem. When I changed the video/image address in the request to an https address accessible from the public network, it was published successfully.

What do you mean by "video/image address in the request"? I create a post and upload media (video) from my local computer.