Add setting to delete all thumbnail files so they can be re-downloaded

Hey jbennett,

The easiest way to delete all YouTube Filed thumbnails is to delete the directory that the module saves its image files in. By default that is sites/default/files/youtube. The easiest way to delete the thumbnail for a single video is to find the file in that directory with the same video ID and delete it. Next time a page is loaded that uses the thumbnail for that video, it will be re-downloaded from YouTube.

There is currently no way to do this within the module settings. I've attached a patch that adds a "Refresh existing thumbnail image files" button to the module settings. This will delete all YouTube Field images in the files directory (as mentioned above) except for those generated with image styles. The message displayed after the button is clicked hints that the imagestyleflush module may help with deleting those versions.

This patch applies to the 7.x-1.3 version. Could you try it? Do you think this button is useful and would help others?

Thanks!

guschilds: I tested this patch against 7.x-1.3 and it is working for me. I think it's a nice feature to have and could help others.

The patch in #1 has been committed to the 7.x-1.x branch. To keep features aligned, this functionality now needs to be ported to the 8.x-1.x branch.

This has been ported to the 8.x-1.x branch and committed. Both versions now have this feature. Thanks again for the help.