There’s already an existing feature suggestion for that… → Add Duration Option to Custom Filters
There’s already a feature suggestion addressing this… → Allow Filtering By Critic Rating and Audience Rating in Movies library
There’s also a number of suggestions discussing options to show additional details on the poster itself (or alongside the poster), e.g.
Don’t get me wrong. I’m not trying to diminish your suggestion.
There’s so many suggestions, it’s easy to miss something or have a suggestion that’s describing the a different approach to achieve the same thing somebody else has already described elsewhere. I’m mainly trying to better understand what you’re trying to achieve – especially if there’s already some means to cover some aspects of that use case (not necessarily how it’s to be implemented or how complicated it’ll be to implement).