The two TV episodes called “Tamano o Yo” followed by “Hitomo no Shi” have already aired on May 26 and May 30 and will feature a new scene featuring Itsuki Tomofusa (Saya's class' President).
The 8 minutes of the film can be found on Yahoo Movies Japan and starts much the same way the first movie did on a Subway train but ends a little differently. If you've seen any of the trailers before now some of this you've already seen but damn I wish the TV series had looked more like this. Now I didn't have any issues watching this on Firefox and Chrome so all should be good.
In the mean time here is the latest Trailer for the Movie which will hit Japanese Theaters on June 2. I hope we get to see this before to long.