You need to make full 25fps (on SA for example). If you don't have any 'proper' hardware to make it record steady at 25 or record at 15 and use a 1.6666 multiplier, as my friend Rusch always say, you'll have 24.999999999 frames, which will make them look blendy.
Instead of using a plugin, you could record at 15fps and use Reel smart motion blur in After Effects, which will make it look like this:
BeaT