To make 1080p/720p/480p/360p YouTube videos, you have to change the video size of Bandicam
Click the 'Settings' button under the 'Video' tab of Bandicam, and change the video size from "Full Size" to "Fit Height", and then enter "0*1080"
Click the 'Settings' button under the 'Video' tab of Bandicam, and change the video size from "Full Size" to "Fit Height", and then enter "0*720"
Click the 'Settings' button under the 'Video' tab of Bandicam, and change the video size from "Full Size" to "Fit Height", and then enter "0*480"
Click the 'Settings' button under the 'Video' tab of Bandicam, and change the video size from "Full Size" to "Fit Height", and then enter "0*360"
To make 720p/480p/360p YouTube videos, you can simply choose "YouTube Presets."
To make 720p videos for YouTube, go to the Video settings menu of Bandicam, and choose the "YouTube (720p)" preset.
To make 480p videos for YouTube, go to the Video settings menu of Bandicam, and choose the "YouTube (480p)" preset.
To make 360p videos for YouTube, go to the Video settings menu of Bandicam, and choose the "YouTube (360p)" preset.
- Recommended upload encoding settings (Advanced) by YouTube: https://support.google.com/youtube/answer/1722171