Yes, that's exactly how the fallback will work. You can download content from 1 or more peers. If all the other peers disconnect, then it'll fallback to the ori

Yes, that's exactly how the fallback will work. You can download content from 1 or more peers. If all the other peers disconnect, then it'll fallback to the origin HTTP server and fetch the remaining bits using RANGE requests. There are a whole bunch of reliability checks to ensure that files are downloaded correctly, completely and as fast as possible (re-downloading as few chunks as possible or not at all).