How can I capture a video of my screen in fedora?

Use VLC Player

How to install vlc?
from a terminal

su -c 'yum -y install vlc'

How to make a screencast using Vlc?

Select OPEN MEDIA

Select CAPTURE DEVICE tab

Change capture mode to DESKTOP

Change Options to 25 f/s

Choose CONVERT option instead of play option

In the Convert window add the destination file via the BROWSE

button then name the file TEST.MPG (VLC does require the extension so the file becomes TEST.MPG rather than just TEST)

Change the PROFILE to VIDEO - H.264 + AAC (TS)

Click the setting button and change the VIDEO CODEC options to:
BITRATE 1200kb/s

FRAME RATE 25.00 fps

Click SAVE

Choose the DEINTERLACE option

Click START