So... The video link preview showing on mine is for "how far can a blowgun shoot"... I didn't watch it.

I use a couple of cheap Bushnell rangefinders for the majority of my work, one a Bushnell Scout 1000 the other a Cabelas branded version of the same. Both have proven to be very accurate to true value, with repeatable readings, out to 400yrds on deer in almost any lighting. On trees, buildings, hillsides, etc, it'll pick up accurate measure to 1000, as advertised.

For longer range work, I have a Leica 1200 that is phenomenal. Not cheap, but it'll measure past 1000yrds on game (or at least the ground at their feet). The 1600 came out shortly after I bought my 1200, I've always intended to upgrade, but I've been well satisfied by the 1200, so I'm scantly motivated to switch.

Preparation in field is what matters most for me. Relying upon real time ranging doesn't usually pay off, but pre-mapping and landmarking the field pays back in spades.