I saw the celebrations on TV also ... just because no one can find the film now does not mean it did not happen. There are lots of films that are only shown once and then disappear - plausible deniability and all - like the brief cellphone video of the three tall males shooting in San Bernardino ... NASA routinely has erased Apollo film to make room for something else. Happens all the time.
Millions of people were running their VCRs that day. If that video ever aired somebody would have a copy and could sell it to Trump for millions. That hasn’t happened because such a video never existed.