Download file (mp4) and upload the same to another web

[elielbeck]

Hi,
I trying to download a mp4 file from youtube with https://y2mate.com/es with "Wait File Download" (DOWNLOADED_FILE_PATH) and upload this to another web with "Open File Result" (DOWNLOADED_FILE_PATH).
But the site shows the error: only mp4 files..
I have tried with another online video downloader but show the same error.

What I'm doing wrong?