So far, the information you have confirms simply that the DVD is using a Taiyo Yuden media ID. If you look deeper at the information given, it should specify the actual media code, such as TYG01, TYG02, TYG03, YUDEN000T02 or YUDEN000T03. This would only include "major name brands" like That's (Japanese brand), Fujifilm, Sony, Verbatim, JVC/Victor and Panasonic.
The next important thing to do is verify the disc is from a brand using authentic Taiyo Yuden stamper codes, rather than faking the data. In other words, to be sure it's a legitimate TY authorized disc, and not a counterfeit.
Fake discs are not the same as the real ones. The code is faked, but the rest of the disc is made from entirely different materials and is inferior in every way.
If you have an unbranded disc, then you'll need to rely on supplier data. If these were purchased from an official Taiyo Yuden distributor, and advertised as TY discs, then you can feel comfortable knowing the discs are fine.
There are also some tell-tale signs to be had from the bulk packaging, even though "Taiyo Yuden" is not always present.
For most TY media, a code like "GGxxxxxx" should appear on the inner-most ring of the disc (the hub). I forget all the codes off-hand, as there are a few. The GG code was from the TYG02 generation of 8x DVD-R.
If these came from
eBay, from some no-name brand like WinData, a random store, or whatnot, then it's likely a fake that is best put in the trash and never used. If it's already burned, copying the video/data to better discs is suggested.
I'd have to know more about where the disc was bought, what brand it might be, etc, to give a more definitive answer on whether it's truly an authentic Taiyo Yuden disc you're using.
The best prices on authentic TY media can be found linked from our main DVD review:
http://www.digitalFAQ.com/reviews/dvd-media.htm
Hope that clears it up.