Answer

Answer
Fixed
Will take a look at this. Can you share a test url?
You're right, the first video is getting added thrice. The second video was added once, as expected. We're looking into this, will update when we fix it. Thanks a lot for reporting the issue.
Fastcompany pages has bad html, the embed code shown in textarea is not escaped so our code is not able to distinguish between actual video code and embed code in textarea, reason for adding video multiple times.
We are working on fix.
Answer
Fixed
Will take a look at this. Can you share a test url?