but people dont buy multi-megapixel HD cameras and then want to email VGA resolution email clips.. thats why nobody else has that feature, your the first person in history to actually want it.
my NVR will push videos to my smart phone when its triggered to, thats the way its done with HD video now days and works quite well.. If you cant use that, then the next best thing would just be playing back the high quality recorded video with a standard browser and simply use email for sending a still jpeg image to indicate there is a recording saved that you can review.
Both HikVision and Dahua can send you a full resolution still image, and record the video to local SD card.. you can get about a full day of 1080p on a 64gb SD card with continuous recording, much more if you have it triggered.
Heck you can even get away with a WiFi cam if all its ever recording to is local storage.