Chained Heroes

 There used to be a site called 'Chained Heroes' which sold films of captive men being stripped to the waist, chained hands above heads and flogged on the back. These promised more than they delivered since the format was so narrow and never showed anything much below the waist. The Russian Captured Boys site seems to be a relative of that site but with more adventurous plots, costuming and sets (and some hilarious acting and bloopers if I'm honest). Recently though I stumbled across another Chained Heroes site.