user20110: I'm creating videos to post to YouTube.
My videos are about some jobs I do on the computer.
I watched some of my videos posted and that the quality of the video capture was not very good and clear.
What should I do to improve the quality of the screen capture?
To use better software? 
I'm using Windows Media Encoder

user3029: Windows Media Encoder creates files in wmv format (I guess), which is highly compressed. Make sure you follow the YouTube recommendations

user19905: Try to use OBS (Open Broadcast Software) for screen capture.
Screen Capture with OBS
It not best option, but it easy  to use and it free.
Best solution:
Capture to lossless codec like huffyuv, edit it and then encode for youtube (you can find tons guides about it).
It requires much more time to process, but you will get maximum quality.

20110: <p>I'm creating videos to post to YouTube.</p>

<p>My videos are about some jobs I do on the computer.</p>

<p>I watched some of my videos posted and that the quality of the video capture was not very good and clear.</p>

<p><strong>What should I do to improve the quality of the screen capture?</strong></p>

<p>To use better software? </p>

<p>I'm using <a href="https://www.microsoft.com/pt-pt/download/details.aspx?id=98" rel="nofollow noreferrer">Windows Media Encoder</a></p>
 3029: <p>Windows Media Encoder creates files in wmv format (I guess), which is highly compressed. Make sure you follow the <a href="https://support.google.com/youtube/answer/1722171?hl=en" rel="nofollow noreferrer">YouTube recommendations</a></p>
 19905: <p>Try to use <a href="https://sourceforge.net/projects/obsproject/files/" rel="nofollow noreferrer">OBS (Open Broadcast Software)</a> for screen capture.</p>

<p><a href="https://www.youtube.com/watch?v=BHmcsVOuFVU" rel="nofollow noreferrer">Screen Capture with OBS</a></p>

<p>It not best option, but it easy  to use and it free.</p>

<p><strong>Best solution:</strong>
Capture to lossless codec like huffyuv, edit it and then encode for youtube (you can find tons guides about it).</p>

<p>It requires much more time to process, but you will get maximum quality.</p>
