There is an incomplete film of an acoustic performance of 'Tombstone Blues' from the Newport Folk Festival 1965.
This was broadcast in Germany on Saturday 9th August 2003 as part of a special night of programming called 'Ruge Nacht'. The actual show that featured the Dylan clip was called "Ruges Amerika 1964-1966" and was produced by the ARD-station WDR. Before that, it was totally unknown footage and it was also not known that Bob Dylan played this.
I would assume this is from the footage shot by Murray Learner for Festival! although I have no idea how WDR came to be in possession of it.
Screenshot / more info to follow...