Wyeth,
It's the Athlon Argos BTR 6-24x50 FFP. I have two of them....the other is on my 6.5 Creedmoor.
Kc, ls,
It's called ShotCut, not sure how good it is but it works for me right now. I have been using Windows Movie Maker until today.....too many glitches for some reason.
As far as tracking pellets, that has to do a lot with frames per second, lighting and color of background.
With the sun behind you, it will light up the pellet very nicely. If you will be doing it on the range, a dark background is best. When I do some accuracy testing of the slugs (100yds), I will use a large black board to put the target on, and I'll place the target at the bottom of the board....this way you can see the pellet as soon as it comes into focus and the rest of the way down to the target.
Another good way is to shoot into an overcast or blue sky.....the pellet will be black against it, especially if the sun is from the side as it will create a shadow in the skirt of the pellet. Here are a couple of videos that show what I'm talking about.
https://youtu.be/GiYVaUh0K9w
https://youtu.be/x9P4kfzSmVo