I shamelessly copied the title of this other video on YT, because in the folder downloaded from the Torrent it’s named (not-so-)simply as “[DVD] Shippu! Iron Leaguer DISC06 Special OP [Kazuhiko Shimamoto ver.] (640x480 WMV9 24+30fps)“
Here it is, the “alternative opening” in its full glory.
Minor warning for the general “bishie-ness”. Some tissues may be recommended before clicking play.