How can I make my own torrent file?

I just signed up a torrent site and I want to upload a file as a torrent file. How can I do that? It has a "Upload torrent" button but when I try to upload a video file it says that this is not a valid torrent file. How can I create my own torrent upload. I want to upload a video file. I use Free Download Manager... show more I just signed up a torrent site and I want to upload a file as a torrent file. How can I do that? It has a "Upload torrent" button but when I try to upload a video file it says that this is not a valid torrent file. How can I create my own torrent upload. I want to upload a video file. I use Free Download Manager (FDM) as my torrent client.
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