I think you're getting confused here between KB & MB. KB = Kilobytes. MB = Megabytes. 1,000 x 1 KB = 1 MB
1 minute of uncompressed PAL/NTSC video = over 200 MB
So how can a 106 KB file = 45 minute video
As suggested in the link I gave above. Most video has been compressed to fit onto cd's. So a 2 hr movie = 650 or 700 MB
45 min video is going to be at least over 100 MB or well over 100,000 KB
Some xtra related reading:
1.
Quality of Content on the Network 2.
Fake movies & why