The disc have not enough space to burn the videos. What to do?

iSkysoft DVD Creator for Mac convert and burn the source videos to standard DVD's MPEG-2 (VOB) format in one unit. When you import video, the program shows the video size in the color bar at bottom. If the video size exceeds the disc capacity, you can either change the default setting Best Performance to Standard for smaller size (but lower quality), or remove some video files. Alternatively, get a dual layer 8.5G blank disc (D9), instead of 4.7G D5 disc. 

The application will alert you by messages. When the video size exceeds D9 capacity, the program will ask you whether to adjust the quality or delete some files if you click the Burn button. Similarly if the size exceeds D5 capacity, the program will remind you whether to compress video.