They have Youtube (where you can upload videos), Google+ Photos (where you can upload videos and stream as well), Google Drive (where you can also upload pictures and videos in addition to creating standalone Google Docs).
It would seem to make more sense to me that there should be a Drive where I store Photos, Videos and Documents, or there should be standalone Photos/Videos and then a separate service for Documents.
To me, these services should exist separately, but Google+ should bring them all together - meaning I can decide, from my photos/videos/documents what to post to Google+. If I want to post a video to the general public, I should post it to Youtube.
Obviously people may have different use cases (consumer vs. business) - but as someone using Google services as both a consumer and business, I find the tools confusing - and it seems to be even more confusing for my Mom.