@Camera-On Problems usually occur when you slow clips Cameron, but I have to say, with hand on heart that … I was talking a load of bollocks! 
I played it again on my laptop (which I used 1st time) and 2 x tv’s and they were all as smooth as butter! So my bad and apologies; but at least you got another 4 views out of it. 
Aha okay that’s good! I’ve had issues with stuttering in the past, and thought I’d fixed the issue. Glad to hear it was spurious!
@Camera-On Really enjoyed that video as it was right up my street…literally, as I live only a few miles from there 
I would echo @AlbionDrones comments regarding transitions and maybe slowing down some of the clips, for example the top down shots etc. However, this really is nitpicking and I’m the last person to criticise as my editing skills are way below yours 
I’m definitely going to try Porchester Castle for myself as I’m hoping my newly acquired Air 3 will help deliver the results I’m hoping for.
Thanks for sharing and I will ‘like’ and subscribe to your YouTube channel.
Andy 