Filming Peregrine Falcon and Kestrels At Salisbury Cathedral

At the weekend, I popped back down to Salisbury Cathedral as I heard that the Juvenile Peregrine Falcons may start to fledge ( they didn't), however, I did choose to pull the trigger on buying the "right tool for the job", by getting a 150 to 600 lens made by sigma!
So I wanted to talk a little about my few days, with the lens and things to be aware of, but also some of the behavior that I have been able to see, over the last few days!
Within this video, I also wanted to talk a little bit, about how I go about filming some wildlife films :
What types of shots?
What frame rates to film in?
What to be aware of, if you are going to use a tele extender?
I also wanted to share a little bit of some of my thoughts, in the coming weeks as the Juvenile's are moving closer to leaving the nest.