Where to begin?
First and foremost you are a rogue in Stranglethorn, I am unsure if you do not grasp the weight that single factor alone has. Your enemies you are facing as drastically below par, I don't want to word this the wrong way, but you are not particularly great yourself and your enemies are even more beneath that. You are essentially facing clicker types. Take for example the hunter in the fourth linked video towards the beginning. He used Aspect of the Cheetah whilst you were on top of him. Following that he didn't do anything in the fight. A lot of this is due to the way some classes are low level, which leads me to my second point.
You are using an "actual PVP class" whereas most of these types are not as favored as rogues. What I mean by "Actual PVP class" is that rogues are built ENTIRELY AROUND the idea of PvP. Even if they weren't designed solely for pvp, their kit and power budget does a lot to give them excessive strength in pvp, rivaled by only a few. Some classes get the luxury of having two in one, however for a lot of them this isn't the case, and your video shows a lot of that.
Next, I get the impression that you live in Stranglethorn. Not that this is a bad thing entirely, it does make me drastically question your capability as a rogue player. Every single one of your clips that I can immediately recall without subjecting myself to another 10 minutes of pain, you had the opener. That is one thing I feel defines a rogue player, how you can fight WITHOUT the opener. I do not mean this as "Lol I didn't stealth." I mean this as someone actually opening on you. Against any enemy with a brain, you will for the most part lose unless the skill difference is very big, or you can abuse your cooldowns to reverse it.
Like, I really hate to say it but you do well to portray the "average rogue in STV" element. However I feel you're also so limited in your capability that pvp against either any half decent player will end badly for you. For someone who during their video in chat said they played Rogue since "actual retail vanilla", you are severely underdeveloped. Maybe you haven't played "Vanilla Rogue" since then, but your movement and overall lack of mechanics says a lot. Players who truly are good, may not understand a new class, but they definitely are able to keep their movement. 30 levels is more than enough to develop a feel for the class again from other expansions.
As much as I hate the guy, I'd cite Prepare the mage. Kid is a complete *****, but his skill at mage is there. I feel if you had encountered him at your current level (hypothetically stating he's the same level) he would mop the floor with you because his skill level is so far beyond yours because he knows his class past the STV phase. Maredokun (his name in beta, I think he's now Maredasan) is another example, stellar warrior player.
I personally don't want to say this either, but you come off as a strict roguecraft junkie. You'll be a 10 minute rogue player, but you won't be able to hold your own as rogue once the gear acquisition makes other classes viable. You'll remain strong until people start getting BWL or even AQ gear, at which point other classes finally have the health pools to survive and you won't be able to hold a candle to them in a real fight. You might still get away with the gimmicky roguecraft stunlock, but in a straight 1v1, or as a serious rogue player, I feel you are FAR from that point.