How to filter 1 view with two fields based on 1 contextual filter?
Try Views Argument Substitutions. It lets you use contextual filter values in the regular filters.


Add a Global: Null contextual filter to get your default value. It's very important to use Global: Null so the view isn't filtered.
In your regular filters, you can add that value with * * * 1 * * * (no spaces) so that you can add AND / OR stuff. Use a different number if your Global: Null isn't at the top of the contextual filter list.