Need some help setting up Google Picker

Could anybody please help me get along with outside storring, Google.Drive in particular? I've done the things from FAQ about Google.Picker, but what do I do next? I don't really get it... Thank you!

What exactly is the issue? How far are you getting? Does the picker appear?
Keep in mind that the picker only works for the video file (YouTube) and the additional download file (Docs). It will not work for audio files because Google Drive doesn't give direct access to those files.

That's my issue right now. I was able to get through the most user-friendly havoc of Google.API finally and it does appear now. But the only reason I was trying to setup SermonSpeaker was the idea that I don't have to store audiofiles on my server where I have to pay money for space while I do have totally unused Google.Drive... No way whatsoever?

Last time I checked Google Drive didn't allow direct access to mp3 files. Thus it is useless for SermonSpeaker audiofiles.
There is AmazonS3 which offers cheap webspace for files. MP3 files work fine there. Or you could look for a hosting offer with enough storage. After all storage shouldn't be expensive nowadays.

Thomas, where can I read what I need to do with S3 service? I did register at Amazon S3 to host audio sermons there, but what do I do now? If Google.Drive is of no use for my case, I am thinking now about the following:
Some sermons are audio only (mine), so I upload mp3 to Amazon and one podcast will be my sermons (audio only) serviced from Amazon.
Other sermons are always video (other preacher), I have special YouTube channel for him, so, I keep using YouTube, and create podcast with Google.Picker, thuus other podcast will have video only items for the other preacher serviced from Amazon.
If there are additional files, like sermon notes, those will come from my Google.Drive (via Google.Picker)

Do I see the picture right? Will it work this way? If it will, again< i'd need some manual as to how do I get SermonSpeaker hooked up with Amazon. I've tried documentation on your site, but didn't see anything about Amazon there... Thank you!

In the SermonSpeaker Options, you can set the "Mode for Audiofiles" (in the File Path tab) to Amazon S3. Then you get three new fields where you have to specifiy your bucket, an access key and a secret key. Those keys can be found or generated somehwere in the Amazon S3 settings. I don't exactly remember where it was, it was quite some time ago when I did it and the UI certainly changed since then
If you have this set up successfully, the dropdown will be populated with the files on Amazon S3 and the uploader will automatically put the files there.
However you can also just paste the link to the file directly into the sermon form. That works as well.

You can indeed serve audio files from Amazon and video files from YouTube and the additional files from Google Drive. That's no problem.