Videos that I inputed stop at a certain time

What is your Video Mode set at? (Click on Output, then Properties) Please share screenshot.
What are the video file properties? (Click on the clip, then Properties) Please share screenshot.

Is that video file in use in another video player?

What are you computer specifications? RAM, CPU, Data Drive (NVME, SSD, HDD), Operating System.

Have you tried restarting your computer?