I really like the "Top ten dumbest tweets" series by the "MostAmazingTop10" channel, because the guy actually reads them out unlike many other similar videos.
It's got a  whopping 15 parts and counting to it, and it's friggin amazing. Here's the link to the playlist, though I also have them all in MP3!

https://www.youtube.com/playlist?list=P … D1R8d3MZX2

Enjoy...

What constitutes a series? there are a bunch of channels I follow, but I'm not sure if that's what you're asking.

ASAP Science they answer everything from what came first a chicken or an egg to questions such as can plants think? As well as some adult subject material all answered with science. Some really cool stuff!

I like the React series by Fine Brothers Entertainment. The best ones are when they get little kids to react to older toys, such as Teddy Ruxpin or old computers. The elders react series is pretty good too, because they get older people to react to stuff that most of them hate, like one of them was about Slipknot, and I think there may have been one for Bring me the Horizon as well. It was some other metal band, anyway. Today's generation of kids express genuine horror at any sort of technology that doesn't involve the internet, lol. And while I actually find that frightening and disturbing, it's also pretty amusing.

Another of my favorites is Poparena. He sadly wrapped up his Opinionated Animorphs Book Guide series a couple of months ago, but his Breaking Spines series isn't bad, either. He reviews random short books in that one, but the Opinionated Animorphs guide will always hold a special place in my heart since it concerns my favorite book series of all time. I hope he plans to start reviewing another book series soon.

Most of my YT subscriptions are gaming or tech related. It looks like we have a lot of common interests @ammericandad, because I also follow cygnus destroyer and equally like his LJN defender and inicent until proven guilty series. I also like the AVGN, but only that series and not the other things they do on the channel (maybe with the exception of Board James) so I don't actually have cinemasacre subscribed anymore. While still talking about games I also like GameSack, who do retro game reviews. Each episode is about 25 minutes long and covers a lot of games in a particular theme (released only in Japan, released only in arcades, very good/bad or with awesome music, etc). They  also do system themed episodes, the latest one being a Super Nintendo episode a few weeks ago. The reason I like them is that they explain the games very well, and unlike a lot of channels you can still hear the game audio in the background and when they're done talking you still get a few seconds of raw game footage. Plus every episode ends with some sort of sketch and these tend to be rather amusing.

Another good channel worth watching is Lazy Game Reviews. He has a couple of different series. He mostly reviews old PC games, sometimes going into more modern things including the sims. He also does hardware reviews of computers like the Amiga, C64, Spectrum or the Tandi 1000, as well as what he calls "oddware", things that are very weird and not very practical like a controller made only to play pool games which he also tried to play Doom with. A similar channel which I found out about through LGR is Ancient DOS Games, who reviews, well, games for MS DOS. The guy is also a programmer and game designer so you often get a lot of interesting commentary. Another channel that does computer games is Kimble Justice. He makes a lot of interesting series, a few years ago he did an "A to Z of licensed games", while currently he's making a lot of documentary style videos talking about various companies, developers or game series, many focusing on the UK market in the 80's which is quite different to the US. These are really well researched and have a lot of interesting information.

Then as far as computer videos, I can definitely recommend danooct1, who shows off DOS and Windows viruses running on actual hardware. DOS viruses especially were very interesting and creative, and he always explains what's going on on the screen so you can follow along really well, occasionally he also does other things like showing off hardware. His friend has a channel called Rogueamp which deals with modern viruses, mostly rogues - viruses that pretend to be anti viruses to scam you for money.

More people that do old computer reviews include vwestlife and uxwbill, who also look at old radios and cameras and these are really detailed. Finally, you should look at Druaga1's channel. It's very chaotic but interesting. He does both old Dos, Windows and Mac videos, tries to put SSD's into just about everything. One of his DOS machine builds actually has a dectalk PC installed and he did a few videos on Dectalk as well.

OK  I just realised I follow waaaay too many channels, so here's a few more that I just can't be bothered to explain that are really cool: Retroware TV, replayretro, ashens (especially his pop station watch series), Lary Bundy JR (fact hunt and games yanks can't wank), caddycarous (Mostly playstation game reviews), I hate Everything (especially his search for the worst series going over the bottom 100 worst movies on IMDB), and somecallmejohny (especially the Johny VS series)

My favorite youtube series is the sml movies. I like them because they are very funny. There is a wiki about them at http://sml.wikia.com/wiki/SuperMarioLogan_Wiki

There is one more series I would like to add. It is called 50 amazing facts to blow your mind. It is a fast paced video and I find some of the facts fascinating

There was a series called why would you put that on the internet. It has 94 episodes. Some of the content provided was very funny.

I think why would you put that on the internet is coming back. According to rob dyke, it will be on his second channel

What channel is that?

Alright, will have a look. Thank you.

Sorry burac, it's just there were 2 convos coming at the same time and I got confused. There's also the short lived "radioactive reviews" series on my brother's channel, silver smoke games. He sadly abbandanned it due to lack of views hence why his recent videos are more in the markiplier style.