For Gamers from an ex-gamer

Some time ago I was a very active player in a popular
MMORPG, and raided from time to time with the others in the game. When we
raided and we were more or less successful we always wanted to record a video to
share our progress. But at that time I had no software capable of recording the
whole raid.  Most freeware was limited to records of 30 seconds and if
not, the quality was poor or the program consumed too many resources and made
playing impossible. Some of the videos I recorded where even rejected from some
video portals because of their poor quality.

I don’t game anymore, but I came across Microsoft Expression
Encoder. It brings the “Microsoft Expression Encoder 4 Screen Capture” tool.
With it you can capture only parts of your screen or the whole screen. You can
record your microphone audio or your speakers directly. To capture a video
while playing I would still recommend you at least a dual core, because
recording consumes here about 15% of one of my cores(dual core 2,2GHz) but only
50MB ram. The only resource which will limit your recordings is your hard drive
space, because a 6 minutes recording (1440x860(cropped taskbar)  at 25
frames)  in raw format is already 550MB. 

After your raid is finished you can open the recorded raw
file in Expression Encoder and  add an audio track, crop the video and
encode it to a more usable format, for example to an mp4. You can also add a
video overlay, for example your raid group logo.  My 6 minutes video
recording of about 550MB is after transcoding to mp4 (same resolution and frame
rate) only 80MB.  For more video editing I would suggest “Windows Live
Movie Maker” which is available for free https://explore.live.com/windows-live-essentials?os=other

Happy Raiding

PS:

As a Student you can get Expression Studio Ultimate 
from Dreamspark  https://www.dreamspark.com/ .

Otherwise you can get the free version of Expression Encoder
which can record up to 10 minutes or  a 60 days trail for the whole
Expression Studio Ultimate  https://www.microsoft.com/switzerland/expression/de/try-it/Default.aspx

Expression Studio Ultimate brings also Expression Web,
Expression Blend and Expression Design.