Take note that changing the extention DON'T change anything in the file itself, just it's name.
Yes! Changing the format used in a video file REQUIRE you to use specific converters. Some are multi-format, some are single format.
Electro
May 2012
Yes, you will need to download special software, you can get it here:
http://convertflvtomp4.org
It is safe for your system and free for you to get, so you take no risk, and it converts the videos really quickly, too.
Jenny
May 2012
Automatic Answer
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