Thanks for the comments again folks, encourages me to make more.
I wish I'd known about the copyright issues with music beforehand on YouTube. Just my inexperience I guess. Is there any (legal) way around it? Is some music barred, others ok (not had this issue with my other vid's)?
Although I didn't see much shooty shooty action in the mission, watching the video back does remind me how utterly fantastic it is to be part of a big team where everyone is doing their job and watching each other's backs. What a great bunch of lads we have here.
On youtube if you want to put music over your videos they always used to be okay as long as you put the music linking in the description (Commonly through Google play) and stated clearly this audio does not belong to me it is ect ect but sometimes they are a little iffy, in response to your is there any music you can use yes there is quite a lot of music around that is free of use for videos on youtube but a lot of it is just meh and to find the better ones it can take a while of searching.