updated related video logic and display
Merge branch 'multipath_node_cache' into noshow_missing_video
Merge remote-tracking branch 'upstream/develop' into noshow_missing_video
Merge remote-tracking branch 'upstream/develop' into noshow_missing_video
Merge pull request #216 from bcipolli/noshow_missing_video

No-show missing "related video" from exercise view.