From Math Campbell:
iPlayer Downloader allows Mac users to download DRM-free content from the BBC's iPlayer service. This app is not endorsed by or provided by the BBC in any way. Not only can you download TV shows, but you can also download radio shows, all in either H264 .mov QuickTime files (for TV content) or MP3 files (for radio). You can also use a proxy connection to download the files, although usage of this feature may not be in accordance with the BBC's Terms of Service; it is down to you to ensure your compliance with them.
What's new in this version:
Fixes problems introduced at the BBC's end a few days ago.
The only reason to do so to my knowledge is to allow Google surveillance of my computer behavior. If your app is going to surveil my computer use, then ASK MY PERMISSION FIRST, DAMMIT. I have used my reverse firewall Little Snitch to deny iPlayer Pro access to Google Analytics forever. I suggest other folks with reverse firewalls consider doing the same.
You must be resident in the UK to use the BBC iPlayer service, although if you use this app you can specify a proxy server if you're not in the UK. This may not be in accordance with the BBC's ToS; this is your concern, not ours.