the discord notification on events sounds like a nice solution. Unfortunately discord is a proprietary walled garden when it come to chat services. would you consider adding similar support for the open source/open standard/open protocol matrix chat protocol? https://matrix.org
matrix also have bridges to other solutions, so by supporting matrix people can get notifications via matrix bridges to things like IRC, slack, messenger, skype, discord(again), twitter, facebook and more.
a really simple way would be a web query similar to
curl 'https://HOMESERVER.COM/_matrix/client/r0/rooms/!uROOMIDCODE%3AHOMESERVER.COM/send/m.room.message/mUNIQEID-1475011239679.575?access_token=supersecretsecret' -X PUT --data '{"msgtype":"m.text","body":"movement on monitor XXYY https://link-to-video"}'
ofcourse homeserver, roomid and secret must be configurable.
or if you want to do it properly, use one of the matrix client sdk's
https://matrix.org/docs/projects/try-matrix-now.html#client-sdks
kind regards.
sep