Captivate9: Get external elements to library and animte them without timeline

You can also animate objects directly using javascript.  

https://elearning.adobe.com/2018/01/how-to-animate-buttons-and-lots-of-other-cool-javascript-stuff/

You can easily import images and audio files into the Library via the small Import button on the Library toolbar (at the top of the Library).

You can also use File > Import > External Library to select another CPTX file and gain access to the Library items in that other project.

However, importing XML (via File > Import > XML) does not add this code text to the Library.

Animating objects on the Captivate stage without using the default timeline tools would require expertise in programming languages such as ActionScript 3 (for SWF output) or JavaScript (for HTML5 output).  Adobe doesn't really supply much information about doing either for Adobe Captivate.  But there are some experts on this forum that might be able to help.  Be aware that their services might come at a cost.