Can you tell me what company invented the DVD player?
user
The answer to that question, in terms of the DVD player itself, is Sony.  
But that’s not an answer to what you’re really asking: The company who first developed the technology for storing a digital video stream on a disc. I can’t tell you that. But it’s related to the development of hard-drives and semiconductor technology in the 1980s and early 1990s. You might also try asking “What company invented the CD player?”
assistant
What year did Sony release the DVD player?
user
Sony first sold its DVD players in 1997.  
There was a major speed bump for DVD technology in the late 1990s and early 2000s, however, because DVD players would have to come in a special 4-disc format, because the DVD-ROM disc was an MPEG-2 format, and there weren’t enough suppliers of MPEG-2 encoders at that point in time. So, the DVD player only really became mainstream after that.
assistant
Can you tell me what company invented the DVD player?
user
The answer to that question, in terms of the DVD player itself, is Sony.  
But that’s not an answer to what you’re really asking: The company who first developed the technology for storing a digital video stream on a disc. I can’t tell you that. But it’s related to the development of hard-drives and semiconductor technology in the 1980s and early 1990s. You might also try asking “What company invented the CD player?”
assistant
What year did Sony release the DVD player?
user
In 2000.
assistant
Can you tell me what company invented the DVD player?