VeraCrypt and 7zip are both good recommendations. I’ve read up on cryptomator, but haven’t used it yet, so it’s good to read an endorsement of it from someone who does for cloud storage.
Edit: you could also encrypt it with a local pgp key if you already use that encryption method with a pgp program or provider
I believe that Odysee and LBRY (the blockchain-based back end technology Odysee sprung from and draws on) are separate companies with different people running them.
You don’t have to touch crypto or use any crypto features to use Odysee, so I’d still suggest it as a platform in the toolbelt in addition to a lot of the other great recommendations you’ve already gotten here in other replies.