FOUR Bigfoots Spotted in Yellowstone National Park?

There's a new video that purports to show not one, but FOUR possible Bigfoot possibly stalking a herd of buffalo in Yellowstone National Park. Most of the video just shows the buffalo walking, but at the end you can see four human-like figures walking in the back right corner. Are they Bigfoots? I don't know, but they do look pretty tall. What do you think? To see the Nat Geo article and video click here.