Description: 1.Makes the text on the thumbnail easier to see when loading the page. 2.Zoom thumbnails on mouse over. 3.Then animate the thumbnail.
About having problems: 1.Some videos cannot be switched because their thumbnails are 403. 2.It may take about 700ms to read an image and it may fail. 3.If the switching time is too early, the image cannot be downloaded. Once cached, they can be displayed faster, but are not yet supported.