As per comment in we are going to show downloading wheel only in the navigation bar on 'Course Outline' and 'My Videos' screens.
When downloading is in progress downloading wheel is appearing on 'My Courses' and 'My Videos' screens.
Downloading wheel should appear on course outline screen instead of 'My Courses' screen.
1) Login to edX app.
2) Tap to select any course.
3) Select videos to download and view.