As of todays date, you can not merge two Google Accounts . If you have two Google accounts for whatever reason (in my case I had YouTube and Android/Google Play Store accounts, which now are really just Google Accounts) the best thing to do, according to Google, is to pick a winner and kill the other one.
To see what is related to each account click https://accounts.google.com/DeleteAccount and sign in. It will tell you what you are about to delete. In my case, my ‘lesser’ account showed hooks into YouTube (and a few others) so I surfed over to www.YouTube.com, signed in with the ‘lesser’ account and confirmed that there was not a single video in place.
In case you think I am mistaken, take it from Google Directly:
It isn’t currently possible to merge separate Google Accounts. However, if you’d like transfer your data from one account to another, this may be done on a per product basis. Or, to start using a new product, you don’t have to create another Google Account. Just sign in with your existing Google Account, and visit this list of products to get started.
You can move information from one account to another for the following products.
- Bookmarks (Export and import)
- Contacts (Export and import)
- Finance: Export and Import
- Picasa Web Albums
- Places (bulk upload)
For any other product, transferring product information is currently unavailable.