So long as you have a ‘modern’ computer running an up to date version of your browser you should have no issues running TubeSpanner on your computer.  

  Know that YouTube as well as the various browsers will make updates and changes to their UI from time to time and we are not given advance notice when this happens.  When it does you may notice some breaks in the functionality of a tool.  These occurrences are rare and usually get patched within a few hours but they do happen and we want to be transparent about that.