I'm a first time user of Sony Vegas Pro so please go easy on me! This is really quite strange. I'm putting together a video compilation of planet earth footage and I get these strange flickers on only TWO of about 40 shots. It's pesky and annoying.

Here's what it looks like:

My project settings are set to: "Template: HDV 720-30p (1280x720, 29.970fps)"

And here is where I got the source material for those two videos.

River shot taken from youtube (4:18 into link), downloaded 720p mp4

Giraffe shot taken from youtube (40 seconds into link), downloaded 720p mp4