Not bad. Pretty funny. Seemed a bit like a "demo" rather than a finished product.
A few comments...
1. As Clay_9 said, the audio was pretty poor.
2. The script is good, and the language appropriate (though "calculations of the break resistance are done" should perhaps be "...resistance are made."
3. Your voice/delivery isn't quite right. Some of the key jokes were lost on me first time around. Getting the speed right is very tricky as you know the script. So what seems slow to you might be too fast for someone listening for the first time. Equally you're very aware of the dangers of it being too slow. Try other people - you may be surprised - someone who sounds good "in the flesh" (where you can also see body language/facial expresions) may not sound good as a v/o and vice versa).
4. The actors are not always taking it seriously - bits of smiles/grins keep creeping in. In a spoof all parts MUST be acted dead straight. (Think Monty Python - no matter how ludicrous the scene and script, Cleese and co always played it right down the middle - now imagine it if they were occasionally having a wry grin - it simply wouldn't work)
"There's nothing hard about being soft" is a fantastic strap line
