From your Loom library, hover over a video and click, then click the three-dot menu on the corner. You then should see the option to delete, duplicate, rename, and move your video. For more information, check out our article here.
From your navigate to a video to open your video page. Then click Edit on your video to open the Settings panel. You should then be able to toggle each option on or off based on your preference. For more information, check out our article here.
Custom branding is only available to Business and Enterprise plans. Check out our article here, for steps on how to configure custom branding.