Large studios charge anywhere from $100K to $400K or more to produce a 30 second TV ad.
Even at $100K that is about $3,000 per second of video compared to $170 per second for a one minute $10K promo video.
The difference is a whopping 18 times cheaper!
Again that is considering a cheap TV ad versus an expensive animated promo video.
So in reality the difference is usually 30 to 50 times less in price for a typical 1 minute demo video than for a 30 sec commercial.
I think value is a matter of perception so If the studio can make it client perceive their work is worth 20 times more and the customer is willing to believe it, so be it!
Read more here 60-90 Seconds Video Cost