Is the marriage considered void if the spouses met online and their families were not informed of this, but rather were told that the meeting took place in the street?

If the marriage fulfills the religious conditions and pillars, then it is valid, and its validity is not affected by not informing the family about the method of acquaintance. However, lying is forbidden unless there is a predominant benefit, and one must repent from it if there was no need for it, as well as repent from any sinful relationship that resulted from the acquaintance.