You may use the ClipConverter.cc for downloading Youtube videos:
How to download a YouTube video:
- Paste your YouTube URL at 'Media URL' and press Continue.
- Select the format and the options for the conversion. The default options are for most videos a good setting.
- Press the 'Start' button at the bottom to start the conversion.
- This may take several minutes. After the conversion is finished you can download the converted file.