Question about the current features

[SuperJMN]

First of all, thanks for your effort to make this a reality!

I would like to know if it's possible to place controls on top of the video rendering surface, so you could get an overlay with any layout over the playing video.

[radiolondra]

Yes, you can add a layer on top of the player, sufficient to show/hide a set of controls to drive the player.

For more info you can give a look at the links below.

There, you'll find also screenshots of the POC videoplayer with a very simple player controls layer on the top of the player with trasparencies to show the abilities of this new LibVLCSharp for Avalonia.
The same code has been successfully tested on Windows, Linux, MacOS and Raspberry Pi with DietPi OS.

AvaloniaUI/Avalonia#2571 (comment)
AvaloniaUI/Avalonia#6237 (comment)

Note: if you build YAMP2 and run it, you will find a complete controls panel layer (UserControl) to drive the video to play (the player is another UserControl over the main window) at the bottom of the player with animations, shown/hided using mouse events (Enter/Leave).

[radiolondra]

If your question was instead about "add text, images,... objects on top of the player, for example, a text object appearing from frame X to frame Y with some sort of animation and with editable properties you can change dinamically" the answer actually is: No. Actually.
Maybe in the next future if the request will grow.