Rootjazz

Have you tried Twilio? I think it's the best out there.

You can build your own Tumblr video downloader tool using their API if you've got decent coding skills. If not, then perhaps, this might help your out. http://www.crunchytricks.com/2016/09/download-save-tumblr-videos.html Revert back if it doesn't help. I might be able to find some other solution fo...

If you haven't tried anything new in the market then I would suggest "thechecker".

Using it personally and no issues so far.

It won't. You need an active connection on your system.