VLC can't plays a file from web

[dvg_lab]

If I open the file from a file system it plays right, but when I open the same file from web server as http network stream, VLC plays only sound and no video. Other files play right (but issue I described bellow) from web and from hdd drive. Web server runs on the same computer locally.
And one more question, if I open files from web though the http protocol it says "This AVI file is broken. Seeking will not work correctly. ..." the same files open locally don't show an errors.

DVG_Lab.