This was a long time pending item on my to-do list. But I can complete it now with the latest update of the Android and Windows 10 app. (v1.23 and v3.1.13 respectively)
Long story short: in the beginning only interviews were available in the app, but recently videos have been added. Their integration into the recent list have not been finished somehow… I know, it is silly, but that is the case.
So, if you are curious to see which lessons did you visit recently, just go to the recent tab/section on the main screen. You can re-open them anytime you want.
Hope you like it.