we have not built an instruction video yet. Currently this is in test/rollout with some of our customers. But yes the idea is to manage changes and their deployment from Test -> Quality -> Production.
The landscape manager itself does not do any syncs. The landscape manager only defines all teh syytems and the cross access and rights and the roles of the systems. That is then th ebase for the Deployment Manager. The deployment manager manages the coping of files, backups, syncs of database tabes and entries etc.
Of course using GIT is also an apporach but the issue there is that this is mixxing development and deployment and our approach is to separate the two and build proceses that woudl sustian and itil compliant operation.
If you are interested in using that and have a real usecase send me an email to firstname.lastname@example.org and we will see how we can directly support you with this.