So whenever i want to watch anime on my samsung phone on the internet. it uses the standard video player but i want to use mx player. Where can i switch this?
Well if you have a Android which i suspect you have to go to the Play Store to download apps. With Android if you have multiple players it will prompt you to slect then give you the option to set as a one time or always.
Go to Settings, Apps Manager, All, scroll down to Video Player, click on it, and "Clear Defaults". Next time you play a video, you will be asked which player to use.