videofiles may have more than 1 stream. they may include 0, one or more audio and/or videostreams. you can get the streamcount for each file out of the AVIParser. you also get the streamtype. make sure the ‘CurrentStream’ pin of the AVIParser is set to the videostream for each file.
if that doesn’T help make sure the file in question is played with MediaPlayerClassic (see Links). if it loads but doesn’t play you likely do have a damaged directshowfilter installed. such filters can be removed. thats a bit tricky. so come back here if you need to know how.