Generally, a DVD is play only, so they have no way of recording the number of times they were played. However, if it is a re-writable DVD and contains a control program, then almost anything is possible.
HD DVDS are DVDs that can be played on high definition TV players. The regular DVD can be played on any TV and is not in the same definition as the HD DVDs.
Cd's are played in a CD player and dvds are played in a DVD player.
Yes, dvds can be played on bluray players.
DVDs can be played on a Blu-Ray player
Yes
dvds are used for storing various kinds of information and media. dvds are often used for storing movies which can be played on a DVD player.
Yes. Double-sided DVDs are just like any other DVD
Yes, blue-ray players can play regular DVDs. However, regular DVD players cannot play Blue-ray DVDs.
"HD" stands for "high density" or alternatively, "high definition." HD dvds were able to store 3 times as much data as other dvds. However, HD dvds have been discontinued after 2008, following a costly format war with Blu-ray dvds.
It is possible that nothing is wrong with your PS2; the DVDs are simply the wrong region. You can mod your PS2 or use a region disk if you want to be able to watch the DVDs.
No some DVDs are restricted to certain regions and others might not be readable by the PS3. My PS3 has no trouble reading the DVDs I make of TV programs I record on my Media Center computer and it upgrades them to near HD quality. It also played the DVDs I rented better than my DVD/VCR.
Yes it is one of the selling features that it will play Blu-ray discs, DVDs and CDs besides also playing game discs.