this is my debugging's result, a little unusual. having brackets together the playlist ID, like this: " »playlist »"
[2014-11-22 21:55:46] [DEBUG] Shortcode Parser: Found a shortcode: [tubepress mode= »playlist » playlistValue= »PLP_1qzR04keDLtqQGCWPb9GTbzMLTHVTc »]
[2014-11-22 21:55:46] [DEBUG] Shortcode Parser: Candidate options detected in shortcode: [tubepress mode= »playlist » playlistValue= »PLP_1qzR04keDLtqQGCWPb9GTbzMLTHVTc »]
[2014-11-22 21:55:46] [DEBUG] Shortcode Parser: Name-value pair detected: mode = " »playlist »" (unfiltered)
[2014-11-22 21:55:46] [DEBUG] Shortcode Parser: Name-value pair detected: mode = " »playlist »" (filtered)
[2014-11-22 21:55:46] [DEBUG] Shortcode Parser: Name-value pair detected: playlistValue = " »PLP_1qzR04keDLtqQGCWPb9GTbzMLTHVTc »" (unfiltered)
[2014-11-22 21:55:46] [DEBUG] Shortcode Parser: Name-value pair detected: playlistValue = " »PLP_1qzR04keDLtqQGCWPb9GTbzMLTHVTc »" (filtered)
[2014-11-22 21:55:46] [DEBUG] Memory Execution Context: Accepted valid value: mode =  »playlist »
[2014-11-22 21:55:46] [WARNING] Memory Execution Context: Ignoring invalid value for "playlistValue" (Invalid value supplied for "Cette liste de lecture".)
[2014-11-22 21:55:46] [DEBUG] Search Output Shortcode Handler: Not configured for search results
[2014-11-22 21:55:46] [DEBUG] Memory Execution Context: Accepted valid value: galleryId = 1899946446
[2014-11-22 21:55:46] [DEBUG] Thumb Gallery Shortcode Handler: Starting to build thumbnail gallery 1899946446
[2014-11-22 21:55:46] [DEBUG] Theme Handler: Attempting to load template instance from gallery.tpl.php with fallback directory at /customers/9/5/6/xooltv.com/httpd.www/wp-content/plugins/tubepress/src/main/resources/default-themes/default
[2014-11-22 21:55:46] [DEBUG] Theme Handler: Requested theme is 'default'
[2014-11-22 21:55:46] [DEBUG] Theme Handler: Found gallery.tpl.php first try at /customers/9/5/6/xooltv.com/httpd.www/wp-content/plugins/tubepress/src/main/resources/default-themes/default/gallery.tpl.php
[2014-11-22 21:55:46] [DEBUG] Theme Handler: Successfully loaded template from /customers/9/5/6/xooltv.com/httpd.www/wp-content/plugins/tubepress/src/main/resources/default-themes/default/gallery.tpl.php
[2014-11-22 21:55:46] [DEBUG] Thumb Gallery Shortcode Handler: Asking provider for videos
[2014-11-22 21:55:46] [DEBUG] Default Video Collector: Current page number is 1
[2014-11-22 21:55:46] [DEBUG] Default Video Collector: There are 2 pluggable video provider service(s) registered
[2014-11-22 21:55:46] [DEBUG] Default Video Collector: Asking to see who wants to handle page 1 for gallery source " »playlist »"
[2014-11-22 21:55:46] [DEBUG] Default Video Collector: youtube cannot handle 1 for gallery source " »playlist »"
[2014-11-22 21:55:46] [DEBUG] Default Video Collector: vimeo cannot handle 1 for gallery source " »playlist »"
[2014-11-22 21:55:46] [DEBUG] Default Video Collector: No video providers could handle this request
[2014-11-22 21:55:46] [DEBUG] Per-page Sorter: Requested per-page sort order is "none". Not applying per-page sorting.
[2014-11-22 21:55:46] [DEBUG] Result Count Capper: Effective total result count (taking into account user-defined limit) is 0 video(s)
[2014-11-22 21:55:46] [DEBUG] Thumb Gallery Shortcode Handler: Provider has delivered 0 videos
any idea??