I'm in the process of archiving all my AMV master videos and came across this very interesting article about choosing the best CD/DVD to back up your data.
How To Choose CD/DVD Archival Media
The author is rather emphatic about the use of Taiyo Yuden DVD+R
and writes a good deal to support his claim. There is more discussion in the replies about how to spot fakes, proper buring speeds, what kind of writing pen to use on your discs, which brands to avoid, etc.
It's very long but well worth reading through if you are serious about backing up your video clips and masters on CD/DVDs that will actually last a long time.