When a file is added, you can define the estimated output file size by clicking the size value. 


In the file list, check the file's output size in the second column from the left:


2. Click the file size information to show compression options. 


There, drag the file size slider to the necessary file size while keeping an eye on the quality below. 


3. Click Apply in the compression box to accept the changes.


4. Click Convert to start processing the compressed file.


If you want to email your videos - normally the mailing servers support attaching files of the size up to 25 Mb. 


Unless you have a very short video, we do not recommend compressing a video to 24-25 MB, as it might lead to significant quality loss. 


Even though changing codecs may lead to substantial decrease of a file size, some space still needed, so it is not possible to compress a 1-2Gb into less than 25 Mb without it being distorted.


Therefore, we recommend uploading a file to YouTube, another social media, or to a cloud storage - some email systems would even allow having previews of the videos attached.