You can use third-party tools. Here I take Fengyun Watermark Manager that I use as an example.
Open the main interface of the tool and click the "Video Watermark Removal" option in the lower right corner to enter the operation interface.
After entering, click the "Add File" option in the middle to add the video to be watermarked, or click the "Add Folder" option at the bottom left to import the entire folder.
After selecting the video to be processed, click "Open" to add it to the operation interface
Set the "Output Path" and check the original directory, which will be saved to our Create a new folder on the desktop and select the "Rectangle Tool" to circle the place where the watermark is to be placed.
After circling, click "Batch Processing" to start the watermark removal process
After the watermark removal is completed, a pop-up window pops up. We select "Open File" in the pop-up window. You can play the video with the watermark removed. The effect is shown in the figure below.