I never finished it. It involved sending Lightning invoices back and forth using extension messages and keeping track of small prepaid balances between peers, but it had too many bugs and I lost my patience. It was a CLI thing in Go and I couldn't find the source code now, anyway that source code is mostly useless. Later I tried to recreate it with webtorrent but didn't go very far either.

These guys did, though: https://web3torrent.statechannels.org/ (it's shitcoin stuff, beware)