Rezwan,
You should definitely try out CamStudio, because it’s open source and noncommercial.
Which means its $-free, ad-free, nag-free, malware free…
It can capture video and audio.
I tried to upload a short snippet from your FF-youtube movie as attachment, but AVI’s (the standard type of Windows movies) are not allowed in this forum, although a great deal of other (Apple) multimedia formats are