DVD+R and DVD-R; What was that about?

We're really looking at the plusses and minuses of this whole ordeal...
Links to referenced videos are down here, too! So I don't wanna hear any complaints about cards not working, ok?

The DVD-RAM video
The SD logo video
The PlayStation video

Looking for the shirt I'm wearing?

And here are some other links for your perusal:
Technology Connextras (the second channel that stuff goes on sometimes):

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