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in search for a YouTube alternative to upload my video
(lemmy.dbzer0.com)
This is a most excellent place for technology news and articles.
If you want it to be discoverable and easy to reach, go for YouTube. Otherwise, you have Vimeo, PeerTube (self-hosted, or you can join an instance), and that's about it.
Your other option is just regular file hosting, and sharing the file directly.