Having trouble viewing and copying files from PC to iPad

I recently updated my iPad to newer version using the Update option after connecting the iPad to my PC.
After that update I'm unable to view the videos from the videos app on my iPad. When I use softwares like Shareit and Xender from my PC I can see the videos of the iPad in the contents of iPad.

Is there something wrong I'm doing because of which the videos content in my iPad are not accessible from the Videos app on my iPad.
Kindly help.