For example, OS X Lion did not have the initial welcome video that I really enjoyed and the AppleTV2/3 also do not have the startup video that the original one had that I thought was great.
Nope. I always found them to be annoying and wished they'd get out of my way.
On certain Motorola software packages that I run, during the installation process, they automatically run short videos. That drives me nuts and I wish they wouldn't do that.
I think the welcome videos were pretty awesome. It added to the "magical" Apple experience and it showed that all the little details matter. Too bad it's gone.