I was able to listen to Sing Allelu - thanks for sharing it, Minorian - but not any of the others. I had never heard of The Odes of Solomon or the Odes Project, so I Googled them and was most interested to read about them.
Was the play-back from youtube that was the reason you weren't able to listen to them?
The other clips you posted just said the video was not available or an error had occurred. I managed to find and enjoy some on Google.
Gillian