Yes, do/don't enable SSID. whaaa...???
For anyone who might still be confused after watching this video, I think I can sum it up by saying that SSID is the broadcast ID of your WiFi (a.k.a. 802.11xx) network. There. I just saved you about 3 minutes of video to watch.
And if anyone is even considering disabling SSID then you should also know that it is a very poor attempt at any kind of network security whatsoever. In fact, disabling SSID is rather like watching an ostrich bury it's head in the sand. Sure, you're hidden but from what/who?! (Anyone who knows how to use a "sniffer" with a free product like Wireshark can still see a bit giant bird butt.)
For any kind of real WiFi security, you must use encryption (WPA-2, WPA or even the horrible old WEP) and hopefully filter each connection according to MAC address (which is something I almost never hear any of these so called "experts" even mention). But really, the best security is to not even use WiFi. Use a hard wired Ethernet connection instead, not only for security but also for speed!