Re: Ten minutes??
"I remember back in my youth that commercials were ONE minute long, and we could take breaks from TV watching to use the facilities. Now we have five second intros to YouTube videos that are all pretty short."
You're probably right that modern attention spans have shrunk horribly. However, I don't think that's the issue here.
It's more likely that they've found a five second non-skippable (but barely worth skipping anyway) advert that shows the product is more likely to be effective than a one-minute advert that's going to get skipped five seconds into the setup. (Or if the latter was non-skippable, is likely to be killed via the impatient user reloading it, or simply ignoring it in another tab until it's over).
Also, you seem to forget that- even in the TV days- ad breaks were never designed for your convenience, to "take breaks from TV watching to use the facilities"... even if many people *did* use them for that purpose!