Seems to me the company posting the video probably made this up. There is no way you could know enough to put that hodge-podge system together and still do such a poor job. I mean flat phone cable in place of network cable? 110 volt switches to turn off your phone system? I call BS.
That is because you have little experience in areas where people hired the cheapest, stupidest, unqualified contractors.
Here is what happens:
Company: [Calls to get bids to cable]
Bid 1: Okay, we will do it for $10,800
Bid 2: Okay, we charge only $150 per drop. $8,000 for the job.
Bid 3: No problem, we will do it for $3,500!
Company takes Bid 3! Turns out, they hired a Drywall contractor who knows absolutely NOTHING about Wiring Standards, EIA/TIA, or Computers. Guy decides it would be cool to put the light switches in to control phone lines and figures... "I can do it just like installing an ordinary light switch."
Company Pays!
1. Company has problems and calls someone like me having no idea the problem is the cabling! They run Active Directory and say 40 workstations on a 2008 Server...
2. They say that sometimes they double click on "Shortcut to Network Application" and it says "Cannot find shortcut." The network drive has a big/red X.
3. They tell you that they are also having trouble with ALL websites and they can't get to their email, either. But, if they reboot their computer it usually works for a while.
^^^^^^^^^^ It behaves weird and they don't know why!
No, I have never seen something this bad, but I have seen:
1. CAT 3 wiring used!
2. EIA/TIA 568B patch panel to 568A keystone jack (customer complained some laptops would connect and others would not from jack) <== Newer ones had auto crossover detection.
3. Broken keystone jacks that don't work right and need to be replaced, but they didn't leave any room in the junction box, so a new cable must be pulled!
4. I have seen tons of Unlabeled Network ports even in buildings with 48+ ports on a patch panel...
5. People who drop a cable down the ceiling without putting a port. They just crimp on an RJ-45 Modular Network cable plug.
6. The wrong color code used unintentionally: i.e. White Orange, Orange, White Green,
White Blue, Blue, Green, White Brown, Brown.
7. I have seen work people who make-up their own color codes: i.e. White Orange, Orange, White Green, Green, white Blue, Blue, White Brown, Brown...
8. I have seen work where people left 2" of unshielded/untwisted cable before a mod plug or a keystone jack!
9. I have seen a CAT 6 patch panel that went with CAT 6 cable to CAT 5 keystone jacks (Cheap jerks).
10. I have seen 3 port network jack covers used with an empty hole because they didn't have a 2 port cover.
11.
I have seen where the customer through they had 2 network jacks, but the asshole that wired them only pulled one wire and connected only one jack. The other jack was just for show and only existed in the faceplate! 
12. I have seen network cable pulled from one room to another but NOT to an IDF or MDF like it should be. In these rooms they would do something like hide a cheap $40 network switch out of site as if it is an IDF. Really screwed up the 802.1x Port Authentication I setup for a client when one of the 5 computers in an area were kicked to the Guest Vlan on the managed switch, the other 4 went with it!
13. I have seen Customers who had proper 50/125 micron SX fiber pulled between IDFs and the MDF only to use old 62.5/125 micron SX patch cables! They wondered why some of their switches would not get connect lights to the far, far away buildings on their campus, lol.
14. I have seen copper network cable pulled way further than 1 meter have too much latency causing CRC errors on a network switch. Customer had to pay for some Corning SX fiber to be pulled, some new switches, and some Fiber Transceivers.
So, do you really think these people who made the video "Nova Data and Voice" who have cabled thousands of buildings for more than a decade didn't run into this?
You get what you pay for or less!
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Now, the company says, "What do you mean you can't fix this?"
I say, "I do not pull cable. The building needs to be re-cabled. I have some names of some licensed, insured cable contractors."
Customer nods.
Now the company calls me back saying, "We just paid company XYZ to do this work and they charged $3500. The company you recommend says it has to be Totally redone! AND they want $8,500! Why so much? Can we get a second opinion?"
Me: Yeah, you can get anyone to do the work but make sure they are EIA/TIA certified and an actual cable contractor NOT a drywall contractor or handyman!
