Just do it!
– Use this texturepack in videos, adventure map, as official texturepack for server etc – but add link to this page in the description please;
– Edit any textures for your own private use;
– Use this pack as an example when creating your textures

Ask first
– Use textures from this pack to medleys

– Re-upload;
– Put a download link behind;
– Use this pack for any commercial purposes (except in commercial let’s plays at YT [remember about Attribution please] ;)).