This introduces a change to the get_the_post_video_url function:
First parameter still is $post_id, second is a boolean if the fallback url should be get (by default false).
So to get the current’s post fallback video url use $fallbackurl = get_the_post_video_url(null, true);.
This branch still internally uses 1.6.1 as version number. It does not change anything else but this change.
Hope it fixes your case,