Because the software will try to ping the dead server, you must block it first.
Find a stable offline installer. Do not use the online stub installer—it will fail immediately. Look for archives on sites like VideoHelp.com (archived utilities).
Official path: Email the code to activate@videoredo.com. That inbox does not exist anymore.
Unofficial path: You need a keygen that can convert the Request Code into an Activation Code. Because VideoReDo used RSA encryption, generic keygens are rare.
Warning: If you find a tool claiming to "crack" VideoReDo, scan it aggressively with VirusTotal. Many contain remote access trojans (RATs) targeting video editors.
A huge segment of VideoReDo users were TiVo and HDHomeRun (SiliconDust) owners. If you are trying to activate VideoReDo solely to remove ads from recorded TV, here is the modern workflow:
This workflow is automated and does not require VideoReDo’s manual cutting interface.