Why can't iPad play while watching anime?

There are several situations in which the iPad can't open the video.

One is that there is no application file for playing this video on the iPad, which means it can't be played.

One is that the iPad has insufficient memory to open the video. At this time, you need to clear the memory of the iPad and try again.

The third is that this video and the operating system on the iPad are incompatible and conflict with each other, so it can't be opened.