>>669
AutoInputプラグインを使えば可能．

下記の Profile は *.mp4 を選択したときに，MX Player で動画再生するようにしたもの．

Profile: VLC2MX (68)
Event: AutoInput UI Action [ Configuration:Action Types: Clicks ]
Application: VLC
Enter: Anon (145)
Abort Existing Task
A1: If [ %aielementtext(1) ~ *.mp4 ]
A2: Back Button
A3: SQL Query [ Mode:URI Formatted File:content://media/external/video/media Table: Columns:_id Query:_display_name = ? Selection Parameters:%aielementtext(1) Order By: Output Column Divider: Variable Array:%result Use Root:Off ]
A4: Send Intent [ Action:android.intent.action.VIEW Cat:None Mime Type:video/* Data:content://media/external/video/media/%result(1) Extra: Extra: Extra: Package:com.mxtech.videoplayer.ad Class: Target:Activity ]
A5: End If