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There are numerous VPNs still working great inside mainland China. I have multiple friends who I talk to over Signal which is normally blocked. It’s just a matter of finding the right provider. Also hosting a VPS outside China as your own VPN can work nicely too - and doesn’t come with the performance hit when using Tor.
VLC claims to do just that: “It can play any video and audio files, network streams and DVD ISOs”
Minors are not allowed to play during specific times and only for a set amount per day. That’s probably why it asks thr info. It’ll prolly be sent off to some state-owned server to keep track of its citizens.