I may have recorded a Yowie call and even evidence of written communication - need feedback

I see Bigfoot Woodcraft signs in the linked video...the structure doesn't look like the ones I find commonly....vaguely resembles them so I am not sure about that but there are lots of other more reliable signs in the video especially the Trails you can see the Bigfoot have been using.....I wish the guy had walked around a lot more to give us more area to parse for signs.