YouTubers have found that internally linking your videos with Cards will help the YouTube algorithm recommended your video to more people.
Many YouTubers believe that asking people to subscribe to their YouTube channels will help them scale up.
In fact, most YouTubers either end or begin with a statement, requesting their viewers to... "like, share, comment on this video. Also, subscribe to my YouTube channel, and don't forget to click on that bell icon to get regular updates on my new videos."
Usually, viewers tend to move on without engaging after watching the video and YouTubers believe that requesting them to engage, will remind them to help support their channel and this type of request is a "call for action" that aims to continue to engage with the existing viewers.
However, several researchers have also revealed that videos that get more engagements will likely get identified by the YouTube algorithm as a high-quality video and get featured in the list of recommended videos.
Sometimes, you don't have to subscribe to a channel for you to be able to watch its videos because that's where the YouTube algorithm comes in.
YouTube identifies what the viewer is interested in through pieces of information that they collect from your search history, watch history and channels you're subscribed to.
If a viewer is interested in "ASMR videos," YouTube will recommend ASMR videos even if you don't subscribe to the channel where the video was uploaded.
This illustrates that YouTube is showing you more of whatever it thinks you like based on the information that you input in your YouTube account.
Upon reading this, do you still think asking people to subscribe to your channel will help you scale up? Well, the truth is, it helps. But it still depends on the quality of the contents that you upload.