We have upgraded our presentation system and we no longer require a countdown clock although if there is one the projectionists can easily skip it. The countdown video here is still available and can be used as the template for the 1920 x 1080 50i format, but we now recommend that, as a preference, you delete it from your finished video.
This is a standard countdown clock suitable as the introduction to a video. The format is to our recommended standard of 1920 x 1080 50i.
Once the file has downloaded, place this clip first on your timeline when editing and most video editors will configure their subsequent output settings to the correct 1920 x 1080 50i. If this is not supported by your editor you will have to select the output format manually.