It has always been stated. For reference, see the report abuse template.
A database is a place to store data. Videos fall under the qualification of data. That was also a quote as Ive seen "store it in your database" as a major suggestion from several people who don't understand the magnitude of what they're asking.
Again, I took the average, as most users don't know about video compression, etc.
I can agree with you on the first sentence. They look through every report abuse and be sure its valid. When reporting people, or using any of our services, you agree to follow our rules. Its put blatantly in our rules that removing evidence will get you a ban.
Im more than open to reasonable suggestions, all so far have been unreasonable, or impossible to implement. We currently have the best solution in place for what resources we are given. If a better solution comes up, it'll be adopted. So far, there has been no "better solution" .
You realize we are consistently adopting new rules, just because it was once edited in january doesn't mean that was when that rule was put in place. We also can, not show edit information. We edit it several times a month keeping it in a stabile condition.