Great video player for iPhone

I play mkv TV shows on the app and they run great.
However, I found that deleting a movie from the app interface doesn’t actually delete it from its “Documents & Data”. I realized this when my iPhone started giving me Storage Full error messages, after a few days of using the app. I was forced to delete the app off of my phone, to clear the “Documents & Data”, as the app itself offers no Storage clearing option inside its settings.