Downgrading to ios 4.1 from ios 5 without shsh? I am looking for a way to downgrade to ios4 without having SHSH.

I found some tutorial one of this a youtube video: http://www.youtube.com/watch?v=QdMHvRsplnw

That say it's possibile to downgrade to ios 4.1. Has anyone tested?

I just can stay with ios5, everything has become too slow (especially the standard Music Library of my ipod touch)

Thanks
No. Without SHSH blobs it is not possible. And devices running the A5 (iPad 2 and iPhone 4S) it is not possible even with the blobs.