Making music videos

Im more familiar with the Audio editing software ,most would say the best (and most expensive) is Pro tools, from digi design. Steinberg have a large suite of tools including a much more affordable and increadibly powerful software called Cubase, there are many others Calkwalk, and Reason for example.

Edirol has some products which are for Audio/video editing purposes , never used them myself, look cool, but then for the price of most of them , they should be. Edirol products

Since all this editing software is for the computer, a powerful computer will help. Running this on Windows 95 with a slow processor and tiny amounts of ram won't help your cause.