Note: This issue is more directed towards people (like me) who searched into the issues of the repository to find answers on if it is a fixable problem.

If you have bedrockify, ReplayMod will most likely not work unless you change a couple settings.

In options > Bedrockify settings > Mixins

you need to disable these two
client.core.clientRenderTimer
client.features.panoramaBackground

if those settings are set that way, you can then safely render your videos while keeping the mod bedrockify :)

side note: it does means however "Idle hand animation" will not work (perhaps "third person eating animation" as well, I'm not sure tho)