Mislabeling the M-1 Abrams' age is the only flaw in an otherwise perfect Internet video.
Attention anyone who would like their web video to be written about (not necessarily by me, I encourage you to set high goals for yourself): this video from Michael Shanks (aka TimTimFed) nails the three most important qualities of a video for web enjoyment.
1. Tell me what it's going to be. A tank playing tennis? Delightful.
2. Give me that.
3. Don't spend 4 minutes making sure I understand that there is a tank playing tennis and that this is unusual. I am not an alien sent here to spy on your species who only arrived yesterday.
That being said, even an alien spy who's only been here for a day knows that the M1 Abrams not only entered service in 1980, it is named for the the commander of US forces in Vietnam from 1968 to 1972. But maybe that was intentional?