interpretation

What is the best way to get rid of a Text watermark on a relatively simple Background? Can I use a Filter (if yes, in wich Plugin), or is there a better way?

I provide interpreting services. What this means in practice is that I usually have the following setup: video comes in via ndi and I pick it up in OBS Studio audio comes in via a third party application which automatically plays the source volume at 100% if there is no interpretation. If...