generally speaking, video files above 1G are in high-definition DVD or high-definition format, such as AVI or MOV. There are several reasons for the card. 1. Incorrect video coding will lead to video playback. 2. Low hardware configuration will lead to card playback. 3. Improper system settings, such as graphics card settings and hardware acceleration.

just check the above three points. If the hardware configuration is insufficient, it is recommended to download the compressed format of RMVB to watch.