It is believed that pi is "absolutely normal" in the strict mathematical definition: that in any base numbering system, any finite sequence of digits appears as frequently as any other sequence of that length. If that's true, then yes, a particular binary string, including one that corresponds to a particular digital file (like a particular mp4 file), can be found in pi.

That said, it hasn't actually been proven that pi is normal. If it's not normal, then the number can be infinitely non-repeating and still never hit that particular sequence of digits.