It may work or "work", but it's not tested by me (the developer). Reason is that RaceChrono only supports traditional 16:9 frame videos, but not 360 degree videos at all. If a 360 video is converted to traditional 16:9 it should work fine, as long as the codecs are compatible (h.264 or h.265 video with AAC audio).
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Update: ended up buying it. GoPro max is supported.
Yeah I have to lock it in 16:9 mode and then it works fine. Does not handle the 360 videos.