When I watch and listen, you articulate the notes in a particular way. There are two factors: joining notes together by hand as one must do for "finger-legato" versus not joining the notes together so as to have a space were there no pedal. The other factor is articulation - how the fingers are put down with what kind of speed or "force". If you aim to play "staccato" with the idea of a particular quality of sound - i.e. sharp, distinct - then you'd have a particular articulation - whereas your legato may be aiming for smooth, even, non-sharp sounds. Both of these things are going on.
I (anyone) can play non-legato with pedal down and make it sound like legato with pedal down, provided the right articulation is there. One can also do the sharp distinct staccato sound with pedal down, and then play legato in a forceful or articulated manner and get that effect.
Originally you wrote about staccato rather than non-legato, and indeed that kind of staccato would sound different with pedal down, than a smooth legato with pedal down. Hope this makes sense.