"Kdo chce pochopit hudbu, nepotřebuje ani tak sluch, jako srdce" "Wer Musik begreifen will, braucht nicht so sehr das Gehör, wie vielmehr das Herz." -- Jiří Mahen
As of 2015-10-18 all videos in this section has been reprocessed, because new versions of FIREFOX have not been able to display them.
Now all browsers should display them correctly.