Yeah filename is enough and yes it's fine if it's small text.
As for the thumbs size the target is 512x512 but none are that size, all of them are 500 in width and most of them 374 in height(4:3 ratio videos) or 281-283 (16:9 videos). The biggest thumb created is 500x500.
Here's a screenshot showing the different sizes just in case.
As for the thumbs size the target is 512x512 but none are that size, all of them are 500 in width and most of them 374 in height(4:3 ratio videos) or 281-283 (16:9 videos). The biggest thumb created is 500x500.
Here's a screenshot showing the different sizes just in case.