We've upload several hundred video news items in the last year and, whilst I agree the optimum benefits will 'theoretically' accrue from manually uploading to the various sites, you have to balance that against the extra time it takes.
We find it is really useful to use an automated upload service. It's a bit harsh to call it 'unethical SEO'. It's not quite the same as duplicate content on two websites. We see some of the videos, with exactly the same description and titles, sitting side by side on the front page of Google, one perhaps from youtube, the other from metacafe. No disadvantage we can see. Haven't seen any differences in views between videos uploaded with unique descriptions and those with cloned descriptions.
As our news videos are deemed 'commercial content' by tubemogul, we have to pay for the service and to be honest we can get the same job done cheaper by services like heyspread.