Here’s something for all Nanoha fans. 
It’s a trailer from C76.
Nanoha A’s portable on PSP. If you played Magical Battle Arena (MBA) before, it is quite similar to it from this trailer. So if you enjoyed MBA, I bet you will enjoy this one as well regardless of the screen size. 
And finally, a longer trailer for Nanoha The Movie 1st.
Extra battle scenes compared to the series and it looks awesome… Something that is definitely worth watching.
And enjoy the video.