So, this is all British English. I'm not familiar with all of their slang.
0:20
he was a real lady's dog ~ Is a play on the phrase "a real lady's man." a phrase indicating that a man is good at picking up women.
a proper buff ~ I'm not really sure what this means to the British.
(and also, just) very brilliant dog
0:43
that's me watching sky ~ she's just saying she's watching TV. She's probably referring to a cable provider or something.
they had all (the Sky movies, and they had) MTV but it's foreign and disney chanel..
1:09
yeah we had to (mix in some cold) ~ she's saying they had to add cold water to the hot water because it was too hot
1:14
70's (night) (1:14) ~ probably a costume party
1:24
some fat bloke we used to punish ~ a fat guy we used to torment/harass/tease
him and his wife (were welfare) ~ poor
really old as well, didn't get involved in anything
we hated them
everyone in (our little gang) did ~ group of friends
i hate short people
1:45
this bloke we used to (see who looked like [Des Lynham])
2:11
(we're organizing a) sing along ~ an event where people sing along with a movie or other sound track
2:24
me doing one of my (dives) ~ presumably he's jumping into a pool
2:43
it was this short little Spaniard dude (he was there on his own) ~ a man from Spain who was vacationing by himself
2:49
(smallest bloke in) spain? ~ bloke = British slang for "man"
thank you