I like the features of my Arlo system, especially the free 7 day cloud recordings, but I want to replace the system with IP cameras that are more open/standard. Are there any software, services, DIY systems that are low cost or free/open source that gives similar notifications/alerts and cloud recording functionality to Nest or Arlo (i.e., storing motion clips in S3, Dropbox/Drive/OneDrive, off-site NAS or even over FTP/RSYNC/BTSYNC)?