I'm not familiar with a website or service called "4tubetv". It's possible that this could be:

1. A misspelling of a more common video-related website or app

2. A new or relatively unknown platform

3. A private or regional service that isn't widely known

4. Potentially an illegitimate or scam site

Without more context, it's difficult to provide accurate information about this. If you have any additional details about what you're looking for or where you encountered this name, I'd be happy to try and help further. Alternatively, if you meant to search for a different, more common video-sharing or streaming site, please let me know and I can provide information on that instead.