Here are three videos showing the progress of Saarlands strongest climber Amos:

This old school footage of his first 7b+ was shot 6 years ago in Grotte du Baldur

Here last year we can see him going on one of his first 8b in Retschelfels

And this one shows his hardest first ascent of Spéléonautes 8c in Grotte du Brotsch