YouTube does not allow creators to like or dislike their own videos.

YouTube creators are not restricted from liking or disliking their own videos. This capability allows creators to engage with their content and express their opinions about it. By enabling creators to interact with their own content in this way, YouTube acknowledges the importance of self-assessment in the content creation process. This functionality can also help creators test the engagement of their videos from their perspective, even if it doesn't affect the video’s overall metrics significantly because viewer interactions are generally weighted more heavily in influencing video performance on the platform.

This understanding aligns with YouTube's broader approach of fostering an interactive community where creators can participate actively in the feedback process regarding their videos. Hence, the statement suggesting that creators cannot like or dislike their own content is false.