"lowless" downloads have nothing to do with file type, it is a method of downloading so that no bits are "lost".
You will find this with a Good Download Manager that knows how to reconnect to the server, pick up exactly where the last Good Byte was received, and then continue on with the download.
It don't matter if 1 second elapses, or if 1 day elapses....
The download manager will make an attempt to reconnect the instant it acquires the internet again.