In the second part of the raid video you can see:
1. copy process of various files on the raid
2. disk usage of the raid volume (df -h)
3. removing one disk to simulate a "hard disk failure" (haha!)
4. reinserting the disk into the raid and rebuilding/recovering the raid volume
5. unmounting and flushing the raid volume for a little benchmark (~10 kb/s)
I'm not finished with my floppy raid experiments yet - I will get some more drives and play with them. Of course I will make a better video for all this later - so stay tuned. ;-)