     OK. All the links I have inserted where to high definition public domain recordings. In some cases I agree, there were similar ones already on the page. But in other cases, there was nothing of comparable quality. For example on:  Coriolan Overture http://en.wikipedia.org/wiki/String_Quartet_No._2_(Borodin)  http://en.wikipedia.org/wiki/Piano_Sonata_in_E-flat_major,_D._568_(Schubert)  http://en.wikipedia.org/wiki/Symphony_No._6_(Tchaikovsky)  http://en.wikipedia.org/wiki/String_Quartet_No._19_(Mozart)  http://en.wikipedia.org/wiki/String_Quartet_No._19_(Mozart)  http://en.wikipedia.org/wiki/Piano_Sonata_in_D_major,_D._850_(Schubert)  http://en.wikipedia.org/wiki/Piano_Sonata_in_A_minor,_D._845_(Schubert)  there is nothing of comparable quality on these. So how come I cannot post links to public domain youtube HD recordings in these cases?  All the best,   