you might be too young
YouTube can definitely be a valid source depending on the channel and what you're looking for. For instance, many companies and organizations do use YouTube to make announcements and various other videos. In fact, the U.S. Governement also has a YouTube account, which would probably mean that YouTube has at least a couple of credible sources.
What invalid token mean when I'm trying to make a new password for draw something 2
No, YouTube is not open source. You can, however, access YouTube's API information should you want to develop an application for it.
invalid ip address means which password you who are not correct.
The meaning of the terms valid and invalid when applied to people can vary depending on how they are used. The word invalid can mean that a person is sick or has a disability. The term valid might mean that the person has an excellent career and family life.
it means not working for you
it means that your to old or to young
Null means zero or invalid.
Because They Are Being Dickholes. Really? just really ^^
what mean the itunes has an invalid signature the download has been removed form the system
The person who referred you not valid.