I like Panamation and NDI Telestrator, but even $200 is hard to find these days in public education. I really wanted to add telestration for football this year. I found a free solution, and while I haven't quite figured out the workflow, I think it will be pretty simple.. The only drawback is there are no shapes, just lines. I may try to add that when I can to the code. The program is called "TransparentPaint"- I found it on github . When executed, the program allows one to draw on a webpage. In vmix, I just added the webpage as an overlay, and use the drawing surface on top of my preview for orientation. It works pretty well. Here is an example of a replay with telestration. Apologies for the quality of the video, I am using vMix basic for this example.