Multimillion dollar businesses are built based on just the discovery feature.
From the article:
> “If you do run a YouTube channel with any type of significant viewership, I highly recommend backing up your videos, in the event you may need to self-host your content in the future.”
Sure, backups are good but anyone with significant viewership should make sure they promote their other web assets to diversify.
Getting people subscribed to your YouTube channel is #1 priority. Getting them subscribed to your email list or to follow you on another platform should be your #2 priority.
There are plenty of alternatives to YouTube for pure video hosting (Vimeo, Wistia, self hosting). There are no alternatives to YouTube for discovery.