Call of Duty 4

Hey guys, I uploaded some low quality gameplay videos of me on YouTube, mainly to test out my capture equipment. They're mostly from private games with friends of mine who aren't that great at the game, and there's a public game in there somewhere too. I'm not a part of any clans and it's rare for me to bump into good players online so I just want to state that my opponents are all inexperienced and my ego is well aware of this, so don't point out the obvious in your comments.

I'm looking for some general advice from people on what I could be doing better and what not. I noticed during the replays that I have that bad habit of respawning and then wasting my grenades in hotspots which usually doesn't result in a kill. I need to stop doing that for starters, but what else can I improve on?

Here's my YouTube channel with about four COD4 videos of me playing.

I'd like to apologise in advance as to how underwhelming these games are, they aren't clan matches or anything special, just practising with some friends. I'm trying to record every game I play hoping that I'll come across a skilled player and have something worth putting up. Anyone can look good when they're killing newbies after all.

To the moderators; there are two video forums and I have no idea which of the two this kind of topic goes in. I just took a guess so if it's wrong please move it for me.