Why does not Vstarcam add this functionality?

Some other camera manufacturers allow the download of videos from the SD card & video recording when playing back. Why does not Vstarcam add this functionality?

Dear Sir/Madam,
Thanks for your message, Currently, there is no video files function in our phone APP， So if you want to download video files from  APP, you must follow the ways below:  1, take out SD card from camera, install SD into card reader and plug card reader into computer USB 2.0 interface, then you can download SD card from PC。