The Transcript block hides the transcript text by default. The transcript text appears when a user clicks the Show/Hide (triangle) button associated with the block.
If you haven't already done so, create a transcript of the project.
In a WordPress Post, click the Add Block button (plus sign.) Search for and select the Transcript block. The Transcript block will appear in the Post.
In the Post, click the Show/Hide (triangle) button in the Transcript block. A hidden block area will appear. Copy and paste the transcript text into this hidden block area. When finished, click the Show/Hide (triangle) button again to hide the hidden block area.
When you are done editing the Post, click Save draft or Publish.