2016-04-01, 20:20
I can confirm that History does not work, as *Spider* suggests it does.
Only videos viewed via youtube.com are visible in History in the addon. No videos viewed via the addon are available in History in the addon or on youtube.com.
I have the Youtube Search History and Youtube Watch History enabled in the Privacy Check up > 5. Personalise your Google experience in https://myaccount.google.com/privacycheckup/
I have had a look trough the API examples on https://github.com/youtube and https://developers.google.com/youtube/v3/code_samples/ and I don't believe that History is available via the API.
Only videos viewed via youtube.com are visible in History in the addon. No videos viewed via the addon are available in History in the addon or on youtube.com.
I have the Youtube Search History and Youtube Watch History enabled in the Privacy Check up > 5. Personalise your Google experience in https://myaccount.google.com/privacycheckup/
I have had a look trough the API examples on https://github.com/youtube and https://developers.google.com/youtube/v3/code_samples/ and I don't believe that History is available via the API.