There are several free video editors out there, Virtual Dub is highly recommended, as for compression for web use, I use Any Video Converter ( that is the the name of the software) another free programme, to convert my uncompressed videos to mpeg2 for youtubing.

with regard to your animation, sorry, but I think the timing is a bit off, the wall appears to be falling in zero gravity whilst the character is moving at more or less normal speed.

my vids can be seen and commented on here

http://www.youtube.com/user/VJflickeringlight#p/a