1. A method of coding video data, the method comprising: obtaining, by a processor, a motion vector for predicting a video block with a non-4:2:0 chroma format; determining, by the processor, a video block size for the video block; obtaining, by the processor, a partition type for the video block; in response to determining that the partition type for the video block meets a partition size criterion and that the video block size meets a size criterion, partitioning, by the processor, a first color component of the video block according to the partition type for the video block and partitioning a second color component of the video block according to a partition type for the second color component that is different than the partition type for the video block; generating, by the processor, a motion vector for obtaining samples of at least one reference picture with which to predict the video block; and generating, by the processor, a prediction block for the video block using the samples of the at least one reference picture and the motion vector for predicting the video block, wherein generating the motion vector for predicting the video block comprises generating a motion vector for the second color component of the video block based at least on a motion vector for the first color component of the video block.