Along the lines of pingfs, I bet you could make a usable fuse filesystem by uploading data to unlisted YouTube videos. Basically a 3d QR code (2 visual, one temporal). Gotta survive re-encoding. I wonder if they notice oddly high-entropy uploads.
Why is this step necessary? mstdn.io might not be the server where you are registered, so we need to redirect you to your home server first.
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