Hikvision Alarm Notifications can be instantly pushed to your mobile device, then you can either play back what just happened or live view what is happening. 

The alarms detected by a CCTV camera, or other devices can be sent to you automatically on the Hik Connect App by performing the following simple configuration. Note: Here we take the motion detection configuration of a DVR

How to enable push notifications for hik connect app on your mobile device

https://www.securitywholesalers.com.au/faqs/setup-push-notifications-hik-connect-app/

Please see guide below