A:AnswerThe unit takes a standard (full sized) SD/MMC card.
You can also plug a USB card reader into the USB port to play media files from other format media cards.
A:AnswerThe unit has AV input - you will require an adapter cable that has USB C on one end and 3.5" male AV plug at the other end that is compatible for you to plug into your Portable DVD Player's AV input jack. It is much simpler to download and copy content to a USB thumbdrive or TF card and play that content on the portable DVD player.