I was able to fill in the form. The video never played and instead a 404 not found page popped up stating that the "server cannot find the requested page." Therefore, I received an email stating "Salesforce could not create this lead because of the reason listed below.
Reason: Use one of these records? Lead Capture Page: Not available. Record Information: 00N6g00000RH9ux = No 00N6g00000RH9v7 = 78000 company = Cyberdyne email = Lily..... encoding = UTF-8 encoding = UTF-8 first_name = Miles last_name = Dyson mobile = (408)444-4444 oid = 00D6g000007QaF7 retURL = http://ww.signingsavvy.com/sign/THANK%20YOU/426/1” submit = Submit"