Here is how to turn your Youtube or Vimeo videos to mp4:
1. Go to https://youtubeinmp4.com/
2. Paste the Youtube/ Vimeo URL on the download box and click Download MP4
3. You may choose to download a standard or an HD version of your video.
3. Wait for your download to finish...
4. When your download is complete, you can now upload it to Gifzign
Note: In the meantime, while our dev't team continues to sort out the issues with Youtube and Vimeo link, feel free to use this workaround. Another conversion tool you can use is: http://www.clipconverter.cc/ Thank you!