If it is reading a burned movie from the internet make sure you set you brun software for captability mode.
If this is a orginal disk make sure its free of dust and scratches.
1. buy a lens cleaning kit from walmart or any other eletronics store.
2. Make sure the disc is free of scratches.
3. change disc's and see if it works on any others.
if these steps do not help then the laser would need to be replaced. Durabrand is a Wal mart brand i had mine for 2 years and i had to clean the lens 3 times with a cleaning kit.
Btw, I’m available to help over the phone in case u need at https://www.6ya.com/expert/edwy_1a56970cf1ea4620