The estimated file size has nothing to do with your original video files size.
It is mainly affected by the total time length of the video files you added to the video disc project.
The longer video you added, the estimated file size is bigger.
It is not an "issue" that requires a fix in the program.
Here are my personal experience for guys who love burning every video files to video disc as backup or collections.
If you burn videos to a DVD-Video disc, the resolution of all the videos will be downsampled to 480P, and the video encoding format will be converted to MPEG-2 encoding format, which the compression rate of MPEG-2 format is much lower than the popular H.264 or H.265 video encoding.
Simply speaking, you will get a much bigger file size after the video conversion (against your original video files), and the quality will be much worse if your video files original resolution is greater than 480P.
In fact, DVD disc is no longer an appropriate media for your video collections if you recorded them by HD or 4K camcorders nowadays.
Because of this, I'm really not a fan of DVD video disc or Blu-ray disc (that the maximum video resolution has 1080p limitation as well). I play my video collections on PC, smart phone, and TV box/dongle instead as it reserves the video quality as much as possible, and it has optimized playback flexibility.
Anyway, try use Smart Fit profile to burn your videos to DVD video disc, but the tradeoff is that you will get pretty suck video quality if the total time length of your video files is very long.
This message was edited 2 times. Last update was at Jun 18. 2020 03:21