Hi @EdwinVarghese! Not sure what you mean by having your face in the screen, but if it means you will add a static image of you on the presentation, it's okay! Using "talking-head" style is not mandatory (although we do recommend using it in at least one or more lectures). You can feel free to upload a screencast or presentation with your voiceover.
Hope this helps!
@EdwinVarghese You can record your screen and your voice while presenting and show a small video of your face in the corner. Is this what you want to accomplish?
Yes it is possible just to show the Computer Screen and Use your Voice to explain
And if you want to add a small Face of yourself in the Video yes that is also Possible
Just Learn little Video editing to make it more engaging
Best of Luck