inconsistent video playback support between Android mobile devices/versions

Description

I'm looking at the DemoX course. I have three Android phones, with Android OS v6.0, v7.0, v8.0.

Bug 1) Go to DemoX / Introduction / Welcome to an edX Course! There are two videos in this module: Greetings from Anant! and Anant at TED. They don't look the same in the list. See enclosed image.

[this incomplete; more details forthcoming]

Steps to Reproduce

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Reason for Variance

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Release Notes

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Not a Bug

Assignee

Jeff Witt

Reporter

Jeff Witt

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