Sending branded videos to your clients is so easy, there is zero setup required.
Open the job card which includes the video you want to send, and click New Email
You may like to read how to attach a video to a job to get started.
Click the video to attach it to the email
Click Send to send the email
You can even customise the information shown on your video
Check out the Advanced Photo Branding add-on -- any settings you choose for Advanced Photo Branding will also apply to videos.