Wat is de beste schermgrootte hier?

Video screenshots

• 00:01
• 00:09
• 00:17
• 00:25
• 00:33
• 00:41
• 00:48
• 00:56
• 01:04
• 01:12

I have been posting videos here cropped to 5:4, this is 16:9 which is best ? At 5:4 they end up with a black box on the screen. Any help would be appreciated.