can ttzip be supported?

[znzn40]

ttzip is tiktok's encoding-type, which is based on Zstandard.

[pimterry]

If you have a working implementation, I'd be happy to accept a PR to include it. You'll need to get some test data, though and then find/build an implementation that works for that case. The zstandard library we use is https://github.com/yoshihitoh/zstd-codec.