A RAW, unedited, master copy, should be available by whomever taped SOTU.. (not streamed..)
These are archived "as is" on HIGH REZ digital formats..usually RED or MOV (quicktime) 2:1 true 4k compression.
For a fee they will send you a copy on whatever format you prefer,(digital tape or harddrive preferably) through the mail..(it costs a bit) You have to have a appropriate player to play it back and some serious hardware to handle professional VS consmer video formats… Movie makers will know what I'm talking about.
The reason I bring this up, is because RAW feed archived video from whomever shot it, has separate audio tracks. Usually 1,2,3,4 or more. If someone said "Trump should be shot", it will be heard on one of those tracks.
THESE