Check ffmepg path, use proper health endpoint

[thespad]

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• [x] I have read the contributing guideline and understand that I have made the correct modifications

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Description:

Benefits of this PR and context:

How Has This Been Tested?

Source / References:

[LinuxServer-CI]

I am a bot, here are the test results for this PR: https://ci-tests.linuxserver.io/lspipepr/jellyfin/10.9.2ubu2204-pkg-7b766203-dev-f70926cb0e2f3c921e01e88c04864c88b919cebe-pr-249/index.html https://ci-tests.linuxserver.io/lspipepr/jellyfin/10.9.2ubu2204-pkg-7b766203-dev-f70926cb0e2f3c921e01e88c04864c88b919cebe-pr-249/shellcheck-result.xml	Tag	Passed
amd64-10.9.2ubu2204-pkg-7b766203-dev-f70926cb0e2f3c921e01e88c04864c88b919cebe-pr-249	✅
arm64v8-10.9.2ubu2204-pkg-7b766203-dev-f70926cb0e2f3c921e01e88c04864c88b919cebe-pr-249	❌

[LinuxServer-CI]

I am a bot, here are the test results for this PR: https://ci-tests.linuxserver.io/lspipepr/jellyfin/10.9.2ubu2204-pkg-7b766203-dev-048fd11f093d08c4cdb7f93a926b32427bc7989b-pr-249/index.html https://ci-tests.linuxserver.io/lspipepr/jellyfin/10.9.2ubu2204-pkg-7b766203-dev-048fd11f093d08c4cdb7f93a926b32427bc7989b-pr-249/shellcheck-result.xml	Tag	Passed
amd64-10.9.2ubu2204-pkg-7b766203-dev-048fd11f093d08c4cdb7f93a926b32427bc7989b-pr-249	✅
arm64v8-10.9.2ubu2204-pkg-7b766203-dev-048fd11f093d08c4cdb7f93a926b32427bc7989b-pr-249	❌

[LinuxServer-CI]

I am a bot, here are the test results for this PR: https://ci-tests.linuxserver.io/lspipepr/jellyfin/10.9.2ubu2204-pkg-7b766203-dev-1c268525638dca31d5d823642d9ad9178651a9ae-pr-249/index.html https://ci-tests.linuxserver.io/lspipepr/jellyfin/10.9.2ubu2204-pkg-7b766203-dev-1c268525638dca31d5d823642d9ad9178651a9ae-pr-249/shellcheck-result.xml	Tag	Passed
amd64-10.9.2ubu2204-pkg-7b766203-dev-1c268525638dca31d5d823642d9ad9178651a9ae-pr-249	✅
arm64v8-10.9.2ubu2204-pkg-7b766203-dev-1c268525638dca31d5d823642d9ad9178651a9ae-pr-249	❌