I also can't get this to work. Or figure out what it's supposed to do.
1. Paste a key from https://console.developers.google.com/apis/credentials into the "API Key" input
2. Paste channel/user URLs into the textarea, one per line
3. Click "Refresh", it will show five latest videos from each channel: https://vgy.me/tfseJu.png
1. Paste a key from https://console.developers.google.com/apis/credentials into the "API Key" input
2. Paste channel/user URLs into the textarea, one per line
3. Click "Refresh", it will show five latest videos from each channel: https://vgy.me/tfseJu.png