PnP provisioning engine does not currently target actual content migration, it rather concentrates on the configuration and settings, like typically web templates or site definitions did. This means that we do not extract content like pages from the existing sites. You can however include those as content in template using xml or code and push then actual content to sites using template model.
If you have any other questions or feedback around the presentation, please use the PnP Yammer group for reaching out to others in the community and to PnP Core team. thx.
Thanks latimoreb for the feedback. Purpose of these videos is to show what you can do right now in the Office 365 and completely agree that the model is not optimal from consumption perspective.
There are significant changes planned on many areas in the Office 365, but right now this model of using alternate CSS adding with code, usually during site provisioning, is one of the models which can be used for applying branding.
These videos are showing different options currently available in Office 365 and we'll certainly update the videos when the capabilities will change to certain direction.
You might also be interested on seeing slightly more advance scenarios and also how the Provisioning engine is used from PowerShell. If that's the case, please check following video from PnP Channel 9 section.