Cloakfish is my product but I still try to be objective:
Cloakfish provides you with a large number of geolocated IPs, much better performance than Tor but still about the same high anonymity as Tor can provide.
You can choose new IPs every 24 hours, so if you require a lot of IPs and/or highest anonymity it's one of the only legal choices you can find.
The downside of true anonymity is reduced performance, often the speed is not better than dialup.
You can choose faster proxies but that will reduce the number of IPs you can take.
For Youtube commenting, account creation,linkwheels Cloakfish can probably do a good job. For Youtube video uploading .. well you can use it but you waste a lot of time due to the reduced speed.
As time is one of your most valued resources you should consider another solution for YT uploading.
For that I'd go for an exclusive solution (hosted, dedicated proxies on highspeed lines).
You might want to check my sale thread for
seo-proxies.com here but there are other guys offering private proxies as well.
In any case try to stick to stuff from reputable companies or people here on BHW.
There is a lot of fraud and scam in proxy business, often you're sold unreliable stuff or even illegal access to hacked computers. So think twice before buying from a newbie or an offer you found using google.