I really learned this trick on this website several months ago. I have a 4K drone that produces 900 MB of data every minute with no audio. I use VideoPad to convert these 4K video files down to a smaller 1080p version with higher grade compression. The result file is 20 times smaller than the original 4K video. So I put all these files in a directory and use VideoPad to add my title, text captions, music, watermark additions. Then once the results are completed I swap the directories over to the large files and run the result with the real files and don't care how long it takes because I'm not watching it. I then make 3 different versions of the same file one in 4K mode, one in 2K mode, and the last one in the smaller 1080p mode.
Now for the problem: the latest version of VideoPad, and I have several licenses v7.25 requires that the video file has an audio addition. So I had to find an old version that had not been updated which was one of my other licenses the 7.21 that allowed me to read the large file in and write it out in the same 4K mode. It produces an audio channel with zero amplitude. But at least it has an audio channel which is required for the new version. So if you're experiencing problems with using a downsized version with 7.25 you need to find an older version unless someone can explain to me how you can create MP4 without an audio channel with VideoPad. Thoughts? Here is the final 2K version that I did last week on YouTube. https://youtu.be/pcsgxAPacwA