Key of F
The key of F is not used too often for guitar in the strumming style at least because it has a lot of barre chords and not a lot of ringing open string ones. It can be a difficult key for beginners if barre chords aren't well known. Here's the group in ascending order:
F _ Gm _ Am _ Bb _ C _ Dmin _ Em7b5 _ F
Here's the progression used in the vid:
F_ Bb_ C_ Dm_ Gm_ Am_ Em7b5 _ F
1 3 2 4 5 6 7 8
See video 2 if you need a hand with barre chords - the guitarist's nightmare and deservedly so :).
Tip: If you need to play a song in F but don't want too many barre chord sounds, you can play in F with a Capo and use open strings.
Place the Capo on fret 1 and use the E family shapes. Sometimes it might be necessary to stay in the key of F if the vocals (or vocalist) demands it :).
A Wah-Wah with some delay is used for effect here, and each chord is strummed just once. The Wah I use myself (and recommend) is the Jim Dunlop Standard Wah. It's a pretty good little moveable box :).
Persist with the barre chords if you have a problem with them. They are not mastered overnight.
Don't 4get to check out video 2 if you need a few tips on learning and playing them.
p.s. Any Thin Lizzy fans out there might recognise the first 4 chords we use here as the same progression used in their classic track 'Southbound'. Not the same chords (Southbound is in a different key), but the same chord interval sequence.