Replace # with _ in filenames.

Some media players don't like # in M3U playlists.

download-yt-feeds

@@ -78,6 +78,11 @@ function main()
         [[ "${file}" =~ "\.vtt$" ]] && continue # Skip subtitle files.
         # https://stackoverflow.com/a/8811800/5965450
         if [[ "${files_before#*${file}}" == "${files_before}" ]]; then
+            if [[ "${file}" =~ "#" ]]; then
+                local file_new="${file:gs/#/_}"
+                mv "${file}" "${file_new}"
+                file="${file_new}"
+            fi
             echo "${file/${download_dir}\//}" \
                  >> "${download_dir}/New_${time}.m3u"
         fi