LRH = L. Ron Hubbard, the founder of Scientology (the cult). All I found find in terms of videos with .lrh in them are all .lrh.avi files uploaded by a user by the name LRonHubbard on thepiratebay (link).
The file isn’t .lrh, you probably don’t have file extensions on all files enabled (in windows). It’s almost assuredly a .AVI DivX file.
You can try playing it with VLC (www.videolan.org)