OH, my God, that's such a white question...
First of all, you need to determine what movie formats your mobile TV supports, the mainstream mobile streaming media is generally 3GP, MP4, or some manufacturer's specific format. There are many movie formats downloaded on the computer, and now the mainstream are RM, WMV, MKV. If you want to play on mobile TV, you must know whether the movie format you download can be recognized by your mobile device. If the format is not recognized, you need to use video conversion software to convert the movie you download into the format supported by your mobile device.
Most of the computer's video format is rmvb compression format, playback to have chip support decompression, many TV because of cost considerations, usb playback is a simple chip, can only play uncompressed avi and other formats such as video, compression format is not supported, TV can read U disk, most of the agreed format is RMVB, try to use this format, Other formats you can just switch to the next software.