What people are trying but failing to explain is that any program is encoded using a lossy compression format when you stream or download, thus no matter what when you download or stream you are NOT getting the original broadcast quality.
Actually untrue you CAN get the original broadcast quality file if you wish but the file size is large and you couldn't tell the difference anyway.
I had assumed when something was labelled hd it actually was, it's not something that matters anyway as the quality is awesome and with my monitor much better than my telly.