There are, of course, a ton of video streaming services on the internet, most of which I've never heard of, let alone watched anything on. On this page I'll list any such service that I'm aware of and can imagine I might someday consider using for watching original content.

Acorn TV
IMDb; official website; Wikipedia

This service has some original series I know nothing about and probably wouldn't be interested in, but mainly it offers various series that originated on TV networks in various countries. I probably wouldn't be interested in most of them, either, though a few I would be interested in include Poirot, "Miss Fisher's Murder Mysteries", and "My Life Is Murder".

AMC+
IMDb; official website; Wikipedia

This launched in 2020 on Xfinity, and later became available through other platforms such as Amazon Prime Video, Apple TV, Dish Network, Sling TV, Roku, YouTube TV, and DirecTV, before launching in August 2021 as... its own streaming service, I guess. I don't get it through any platform, but it has some shows I might not mind checking out someday, including Dark Winds (which also aired on AMC), Moonhaven, and Pantheon.

Blip (now defunct)
IMDb; TV Tropes; Wikipedia

Originally known as Blip TV, this website ended in 2015. I guess I was vaguely aware of it, but I don't think I ever watched anything on the site, at least not directly. I did watch the webseries Echo Chamber, which was hosted by this site, but I don't think I was aware of that, since I watched the series on TV Tropes. And I expect most or maybe all content that was hosted on Blip, you could now find on other sites, probably. (In fact some of them may have been hosted elsewhere before they were on Blip. I don't really know.)

Crackle
IMDb; official website; Wikipedia

I don't usually think of this as a producer of original content. Mostly it's for streaming various TV shows and movies. I suppose whenever I first became aware of it, I probably thought of it as a site that streamed anime, so that sounded interesting to me, but I never really checked it out, or anything. Still, I guess they do have some original content. I find it unlikely that I'd ever watch anything on the site, though, and if I did, it would more likely be stuff that originated elsewhere.

Crunchyroll
IMDb; official website; TV Tropes; Wikipedia

This is something I think of mainly as a place to watch anime, which obviously originated elsewhere (in Japan, whether on TV networks, movies, websites, whatever). Although I don't think I ever actually watched anything on Crunchyroll, I liked knowing it was there. And there's a YouTube series, Anime Crimes Division, that also appears on Crunchyroll, and the company had a hand in producing or financing or whatever. And I think they're supposed start producing their own original content in 2019. So that could be interesting.

go90 (now defunct)
IMDb; Wikipedia

This was a service that could be watched on the web or on mobile devices, offering a lot of different movies and TV shows... I only watched a few things on it: Miss 2059, and Sleep Tight, and several episodes of Life Hacks for Kids. (In fact, I didn't know the latter series existed until I discovered it on go90, but I later watched a lot more episodes of it on YouTube... and that led me to discover DreamWorks's YouTube channel, with various other shows... at least one of which became of interest to me. Though I don't know if it was ever on go90.) Anyway... the service turned out to be a failure, which is a shame. And now I don't know if the first two shows I mentioned are going to become available elsewhere.

Shudder
IMDb; official website; Wikipedia

I don't know much about this, but it streams horror movies and such. Some of its content is original. It seems like something I wouldn't mind checking out someday.

VRV
IMDb; official website; TV Tropes; Wikipedia

I don't know much about this, but it does have newer seasons of some Cartoon Hangover series (such as Bravest Warriors) that were on YouTube in earlier seasons. And it used to have some Geek & Sundry stuff. I never actually got to see anything on VRV, but aside from the channels I mentioned, I never had much interest in it, anyway.