I updated this video to show how this is done in Photoshop CC 2021. You can check it out here - • Adding a Watermark (Logo) to a Video ...
Have you wanted to add a logo to your video files but don't have any software available to you other than Photoshop? If so, this tutorial is for you. It's a pretty straightforward process. I use Photoshop CC 2015 in the video, but this capability has been available to Photoshop users since version CS3.