I am surrounded by internet issues... my isp can't help

[jerador]

specs
modem = Arris DG860p2/NA - 798995
isp = Cable one
payed service speed = 70mb's
Ethernet = cat-5e
os used for testing = windows 8.1 on desktop and laptop android(uptodate)-
-Samsung note 4

1 note while reading the following internet speed is the overall issue
2 though the source of witch I am having difficulties finding
3 paying for 70mb's
4 internet speed testing at 2-5mb's "ookla"/youtube ect (BAD!)
5 internet speed test on cable ones site 68-75mb's (my isp)(GOOD!)
6 tested both several times btw
7 I will be demonstrating issues i find and tests i have done to find/fix said issue in order
8 from the start of my day also take note of the numbers to the left...will be used as
9 navigation
9&1/2 this is all Ethernet connected directly to modem unless specified otherwise
10 youtube videos run much slower then usual...hmm
11 check oolka speed test result = BAD! as mentioned above (3-6)
12 check different browser = same result
13 check other things such as Netflix/amazon ect result = same
14 check different pc = same
14&1/2 checked WiFi = same poor performance
15 reset modem = problem unchanged
16 checked for downloads that might inhibit speed found none = issue persists
17 disconnected every pc but one just to be sure = same
18 contacted cable one at this point they had me test speed on there site (see-5)
19 they gave no extra help
20 scratches head...tests everything again result = same really bad internet speed
21 checked multiple pc for malware/spyware/virus none detected = problem unchanged
22 updated windows 8.1 = no change
23 updated web browsers google chrome/internet explorer = no change
24 deleted all programs I recently installed = no change
25 checked task manager for network traffic collectively never went above 5%used
26 attempt to consult those smarter then myself = still in progress
so at this point I don't what to do or what else to test to give me some kind of clue
and every forum I have found has told me to contact customer support and as mentioned
above that was useless(see 18-19) and more confusing considering there test result was
normal(fine) and all my real world tests show that internet speed is lacking quite a bit and not
just some small variation(see 3-4-5-6)

 

[HEXiT]

try running a free vpn like cyberghost and see if your streaming video starts to work. if it does its likely your isp throttling your streams...
they will claim its nothing to do with them but more than likely it is. you wont get your full speed with cyberghost (free) but you will likely see an improvement in such as you will probably get less buffering.
if your lucky you may be able to get your hands on a 3 month trial for cyberghost. if you do you will get your full speed and unlimited (i downloaded 390gig in 1 month) usage.

 

[jerador]

try running a free vpn like cyberghost and see if your streaming video starts to work. if it does its likely your isp throttling your streams...
they will claim its nothing to do with them but more than likely it is. you wont get your full speed with cyberghost (free) but you will likely see an improvement in such as you will probably get less buffering.
if your lucky you may be able to get your hands on a 3 month trial for cyberghost. if you do you will get your full speed and unlimited (i downloaded 390gig in 1 month) usage.

so I downloaded cyberghost
tested internet connection without it enabled got a more the horrible 2mb's down
enabled cyberghost tested again got 25 mb's better
disabled cyberghost and tested again got full 70mb's
what is this weirdness?

 

[HEXiT]

that could well be isp throttling mate.