By Lord Christ I hate Reddit and its redditors so much. Look at this:

I watched a video which said the disc drive in a PS1 is basically the same as a modern laptop's. Ever curious, I thought "Huh, I wonder if you can mod a PS1 to play DVDs?" So I google it and the first result is this
magnificent thread.
The OP (Original Pube) gave his post a bulky title. The main question was buried between what he learned on Wikipedoa and his current PS1 ownership status. Just ask the question.
The First Retard acted like console modding is done for practicality. It can be but is mostly a hobby and challenge for tech autists, a way for them to make and burn extra cash.
The Second Retard lied outright. DVDs were developed and released between '95 and '96 -
when the PS1 launched. It seems there was a fight in the replies between OP and 2nd Tard that was deleted out of rightful shame.
The Third Retard stated something OP said in the
first post like it was new knowledge, while this first post was on 3rd Tard's
very screen.
The Fourth and Final Retard recounted a trivia fact that has nothing to do with OP's question.
Nothing.
That's it. The Four Retards of Reddit killed the thread. If you're wondering about the opening question, after half an hour of work I think to play DVDs on a PS1 you'd need to swap out the lens and speed up the drive in software, and even then the motherboard's data paths may not be fast enough for the job. So there. Kill Reddit.