I don't speak "polite", but is this message saying something along the lines of "this person isn't popular enough, so we're not letting him become popular"?
It essentially means "This video went viral, but the channel has had little to no presence before this. In case this is a scam, we are limiting the number of viewers until we trust the creator."
In the long run, this will likely actually help the creator.
If a channel grows VERY quickly, like double digit percentages in days quickly, it causes issues for the creator that can slowdown, limit, or permanently harm their ability to grow.
These issues are complex, but they basically boil down to: lots of people join the channel, they quickly forget about the channel, the channel LOOKS like it is very big but actually only gets a small number of views (see follow up comment for info).
Another issue is trolls. A channel that very suddenly grows will have an influx of trolls and negative opinions, mostly in the form of comments. At this point, the channel does not have a strong supportive community to counter this, leading to a lot of negativity which can not only be disheartening for...
...the creator, but more importantly turn potential people of the channel when they see that most of the comments are negative. Keep in mind people are much more willing to complain than to compliment, so the negative comments will be a vocal minority.
Finally, the last big thing is scams. If a video/channel grows too quickly, it could be a result of an exploit/bug in the algorithm, or a view farm trying to boost a channel very quickly. This is never a good thing because it forces the channel onto a wider audience inorganically, so many people won't actually want to see it.
(The follow up comment) You can see this in action by comparing the number of views to the number of subscribers. Ideally, they should be kind of equal, preferably weighted towards views.
View indicate how popular THAT video was, while subscribers indicate how popular your channel was AT ITS PEAK. If subscribers are higher than views, that means that a majority of people who liked your channel in the past, don't actually stay up to date with new uploads, which doesn't actually help you at all.
If your subscribers and views are similar, then it is likely that many of your subscribers are following new uploads, giving you a more stable and reliable rate of growth, and income per video, which greatly helps long term stability.
It's worth mentioning that views higher than subscribers isn't necessarily a bad thing, but it usually means that a video went viral and reached a big audience, but they weren't interested in the rest that your channel had to offer.
it's also worth mentioning that it takes a very significant deviation from a normal view count to trigger this message
a typical viral video won't do it, and in most cases when you see it, something fishy is probably happening
In the long run, this will likely actually help the creator.
If a channel grows VERY quickly, like double digit percentages in days quickly, it causes issues for the creator that can slowdown, limit, or permanently harm their ability to grow.
These issues are complex, but they basically boil down to: lots of people join the channel, they quickly forget about the channel, the channel LOOKS like it is very big but actually only gets a small number of views (see follow up comment for info).
Another issue is trolls. A channel that very suddenly grows will have an influx of trolls and negative opinions, mostly in the form of comments. At this point, the channel does not have a strong supportive community to counter this, leading to a lot of negativity which can not only be disheartening for...
Finally, the last big thing is scams. If a video/channel grows too quickly, it could be a result of an exploit/bug in the algorithm, or a view farm trying to boost a channel very quickly. This is never a good thing because it forces the channel onto a wider audience inorganically, so many people won't actually want to see it.
View indicate how popular THAT video was, while subscribers indicate how popular your channel was AT ITS PEAK. If subscribers are higher than views, that means that a majority of people who liked your channel in the past, don't actually stay up to date with new uploads, which doesn't actually help you at all.
If your subscribers and views are similar, then it is likely that many of your subscribers are following new uploads, giving you a more stable and reliable rate of growth, and income per video, which greatly helps long term stability.
It's worth mentioning that views higher than subscribers isn't necessarily a bad thing, but it usually means that a video went viral and reached a big audience, but they weren't interested in the rest that your channel had to offer.
a typical viral video won't do it, and in most cases when you see it, something fishy is probably happening