Once you've kept them for the drying out period, mummies quite happily preserve themselves as long as they are kept dry, and Egypt is rich in dryness once you get away from the Nile floodplain. It's only that initial period you need to get over. It's not unusual for people working on old houses in Britain to find an animal, often a kitten, mummified and hidden in the eaves or in a chimney as a good luck charm.

As for supernatural powers, if they had them they didn't use them very usefully, as it's clear that most of the population spent their lives in hard dull repetetive labour, and that one of the reasons for mummification and the building of vast tombs was to relieve the owner from having to do this in the afterlife.

I don't like youtube either, and I've got a reasonably fast computer... do you have broadband out in the Wylds of Why-oh-Wyoming Sorcha?