Yes, it won’t work with L3 keys. As far as I know, L1 is different, you cannot just extract it without hacking it.
I never heard of L2 too so no idea. And yeah, you need physical device for L1. In some cases, you don’t actually need the device, but the keys to decrypt the video.
Try the other VPNs. The last time I used a VPN to stream test the other location was PIA. VPNs with servers for streaming should work.