If its only the video (this may sound like a wierd idea) since you have bootmii and an NAND backup you may be able to just blindly dump the NAND back on. Meaning that if you now the exact amount of icons its over and can get to it and know what to press at every given time you may be able to dump the NAND back on. Just and idea though. P.S. if you do this give the NAND like 30-45 min to install just to make sure.