I tried to download HDVR Media Player, but it appears it isn't possible anymore. Because of this, I can't really say how and if it's possible to add the timeline in the AVI player. If you still have the application installed, access its built-in Help section to learn if that's possible.
However, what you're asking involves creating a media player that contains what you need in terms of player controls and playback. You can try using an alternative. For example, the VLC Media Player is a good choice when it comes to playback with all the features that you need.