watch however many times

More or less, but it is awkward. Perhaps you could say "This is an action-packed scene that I never tire of, however may times I watch it." I don't like to rewrite other's sentences, and your version will be comprehensible to a native speaker.

...watching--however...

Still there's a previous posting I like even better but which I am prohibited from further comment on

...comment upon....

...from which I am prohibited....