Hi there, Thanks for a response.
Yes earlier even my app used to be around 40MB.
I don't have any videos on my phone memory, all videos are at my SD card.
I am running the latest W10 Mobile build : 10.0.14393.321
All i can recollect is opening this app and browsing/viewing some videos(present at SD card) on my phone.
After few days, i noticed that my phone memory got full and this app was the culprit.
Needless to say, I did a soft reset. I guess its some cached data which is consuming the memory?
But then when the Films & TV app was updated at store, i updated my app too, thinking the problem will solve.

But nothing changed!
Help me please! Now every time i get a low storage warning
