Whether DVD or MP4 is better depends on your specific needs and the devices you plan to use for playback.

DVD (Digital Versatile Disc) is a physical format that can hold up to 4.7 GB of data, or 8.5GB on a dual layer disc. DVDs are widely compatible with 99% of DVD players, as well as many computers and gaming consoles. They offer good picture and sound quality but not generally not good enough if you plan on editing the footage or converting it again in the future.

MP4 (MPEG-4) is a digital format that can be stored on a variety of devices, including computers, smartphones, tablets, and USB drives. MP4 files are smaller in size than DVD files (at the same bitrate), which makes them more convenient for storage and sharing. They can also be compressed for streaming and offer good picture and sound quality. At a larger bitrate they retain more colour and general quality than a DVD and great for editing.

Here are some factors that can help you decide which format is better for you:

• Compatibility: DVDs have a broad compatibility, and most DVD players can read and play them without issue. MP4 files are also widely compatible, but they may not play on all devices.
• Convenience: MP4 files are more convenient for storage and sharing, as they take up less space than DVD files and can easily be transferred to different devices. DVDs are also convenient, but they are physical and can be easily lost or damaged.
• Cost: DVDs are relatively inexpensive to produce and can be easily replicated. MP4 files can also be inexpensive to produce, but they require a different type of equipment and software.
• Quality: Both formats can offer good picture and sound quality, but the specific quality depends on the compression settings and the quality of the original source material. A MP4 file is capable of being a better quality file than a DVD if the bit-rate is correct.
  

In summary, DVD and MP4 both have their own advantages and disadvantages, and which format is better for you depends on your specific needs and the devices you plan to use for playback.