Are you going to automatically collect the data on the plates? or just need a good picture to reference to and manually find the details?
If your requirement is just to get a good still photo while recording the video, you camera positioned at 2.5m high and about 10m from the target, I guess that you would be able to use the hfw3541ep-sa
If your requirement is to automatically collect the data, then I would recommend a LPR camera instead.