Quite nice!
I have a few suggestions, obviously totally up to you, but here goes.
Don't be afraid to cut bits out. Snappy videos are what trailers really need to thrive. I would personally cut it up so that you say:
"Well hello there ladies and gentlemen" *cut* "My name is Godafoss94 and welcome to my channel"
Then after you say 'welcome to my channel' - start the Skyrim video, but continue the narration in the background.
"If you like flying bandits" "WOAH! Hahaha" *cut* "Look at him fly!" *cut* start the Amnesia video with the narration in the background.
"Scary monsters." "Oooh, I don't think he's following us anymore" "Don't turn around, don't even turn around." "OH NONONAOHWDOAHWaoidhioahwd"
Start the dog video, again narration in the background to introduce clip.
"Or even cute puppies."
Then after that game play clip, cut to you holding your dog - maybe telling it that the dog you just hit over the head in the game wasn't real, turning your eyes towards the camera awkwardly near the end. *cut*
"If you like any of these things, then sit back, maybe eat some dancing pie" *cut to dancing pie*
"And join me in some interesting adventures... I hope to see you again soon, Goodbye!"
I apologise for the large mess above - as well as my possibly unwanted suggestions.
Still enjoyed the video, just giving it some tempo would jazz it up. =)