Anyone seen a video of Hendrix burning the confederate flag?

An older friend of mine was telling me about how he had seen Jimi Hendrix in Portland, OR around October in 1967, and the fire marshal had warned him not to burn his guitar on stage bc of 'fire hazard'.

According to my buddy at the end of the set Jimi Hendrix came onto stage wearing the confederate flag playing the star spangled banner, and proceeds to burn the flag while playing the national anthem.

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Since its so long ago im not sure how likely there's a video of it, but if anyone has seen one like that id fuckn love to watch it