I have put together a small python script to resolve the links from vidtodo.com
Im not sure how to make this into a urlresolver plugin, maybe someone else can add it. Works fine for all the links I pass it.
Hope this helps to add another host to the resolver. 
Im not sure how to make this into a urlresolver plugin, maybe someone else can add it. Works fine for all the links I pass it.
Code:
import requests, re, time
def GetVidtodo(url):
headers = {'content-type': 'application/x-www-form-urlencoded', 'User-Agent':'Mozilla/5.0 (Windows NT 10.0; WOW64; rv:52.0) Gecko/20100101 Firefox/52.0'}
page = requests.get(url)
id = re.search('name="id" value="(.*?)"', page.content)
fname = re.search('name="fname" value="(.*?)"', page.content)
hash = re.search('name="hash" value="(.*?)"', page.content)
data = {"op":"download1", "usr_login":"", "id":"%s" % id.group(1), "fname":"%s" % fname.group(1), "referrer":"%s" % url, "hash":"%s" % hash.group(1), "imhuman":"Proceed+to+video"}
time.sleep(2)
realpage = requests.post(url, data=data, headers=headers)
rawlink = re.search('sources:.*?file.*?file: "(.*?)"', realpage.content)
return rawlink.group(1)