The film you mentioned is not described clearly, and I have never seen it. However, for the video of 10 second countdown, you can try to find relevant information, and there may be something more suitable for your needs.

Let me talk about my general method of finding video material:

Open the search website:

http://aur.one/

Select "Picture"-"Thousand Maps Network", enter "Countdown" and press enter:

Filter as "Video/Audio" in search results:

These countdown videos are very effective, and there should be one suitable for you. After logging into the social account, Qiantu.com can download these high-quality materials for free. If it is not a VIP, the number of downloads per day will be limited.

Of course, if you want to modify the editing countdown effect yourself, you need a video engineering file. Take AE files as an example, go back to the search website, select "Video"-"New CGer", and press enter: in the new CGER, these video materials can be downloaded for free, as well as AE engineering files, which can be modified and edited by professional video special effects software such as After Effects.