oh no idea I only work on Windows, probably have to search in Google or in the description

The device "External USB DVD drive (DVD-USB-03)" from Gembird is not guaranteed to be compatible with the newer Apple devices, especially those with M1 processors. - The newer MacBooks with M1 processors often do not have enough power to operate external DVD drives via the USB port, especially if they are bus-powered drives. - Although the drive has a high-speed USB 3.1 interface, there may be problems if it is connected to a Mac with Thunderbolt ports via an adapter. It is advisable to check whether the specific model of your MacBook supports the drive before purchasing, or to use alternative solutions such as ripping DVDs to the Mac.

mp4 is a video format that you can not only "listen" to, but also play with a corresponding video player. If you mean .mp3, then yes, too. You just need the appropriate player on Mac, Linux or PC that can play it.

Yes, on the laptop nan

Yes, the power supply runs via the USB cable.