PhotoCast App for Chromecast
Not sure if there's a thread for this, but I just discovered this great app called Photocast for Chromecast (iOS, but available for Android too- free).
Initially you could only cast local photos (HD) on your phone, but with the latest update a few days back, you can cast videos too and it works great!!
Credit to the developers, something that I always wanted since I got my Chromecast so just thought it should get a mention!