Video disappears when parsing markdown back to blocks after page refresh

[iyansr]

Bug Description

When uploading a video to the editor, it renders correctly and exports to markdown as expected. However, when refreshing the page and parsing the same markdown back to blocks, the video disappears and only the thumbnail image remains.

Steps to Reproduce

1. Upload a video file to the BlockNote editor
2. Export content using editor.blocksToMarkdownLossy(editor.document)
3. Refresh the page
4. Parse the markdown back using editor.tryParseMarkdownToBlocks(content)
5. Replace blocks with editor.replaceBlocks(editor.document, blocks)

Expected Behavior

The video should be preserved and rendered correctly after parsing markdown back to blocks, maintaining the same functionality as before the page refresh.

Actual Behavior

The video disappears and only the thumbnail image is displayed. The markdown link reference to the video URL is lost during the parsing process.

Code Samples

Export (works correctly):

const markdown = await editor.blocksToMarkdownLossy(editor.document)

Import (loses video):

const blocks = await editor.tryParseMarkdownToBlocks(content);
editor.replaceBlocks(editor.document, blocks);

Markdown Output Comparison

After initial upload (correct):

asdasd

[](https://cdn.plyr.io/static/demo/View_From_A_Blue_Moon_Trailer-576p.mp4)![1lpV49uSTaxnGNRCY99wXkQ.png](https://xxxxxxx.cloudfront.net/d52a08cb-1ede-44a1-bb57-4eb72bc329b0/files/7ea09d03-4273-467e-ab03-b86d8bb18c1d.png)

After page refresh and re-import (incorrect):

asdasd

![BlockNote image](https://xxxxx.cloudfront.net/d52a08cb-1ede-44a1-bb57-4eb72bc329b0/files/7ea09d03-4273-467e-ab03-b86d8bb18c1d.png)

Environment

• BlockNote version: ^0.34.0
• Browser: Arc Browser
• OS: Mac OS Sonoma

[anggapur]

Same here, I faced similar issue