If an electronic device was seized that had evidence in relation to whatever offence the police are investigating, it would be kept by police until the end of trial. If it was found not to contain any evidence in relation to the offence being investigated, it could be given back to the owner before that.
If "the video" was in itself related to the offenses being investigated (which I personally doubt), the video would not be released to the public because that would potentially taint the investigation for trial.
If "the video" is not related specifically to the offences, it would not be released to the public because that would be a breach of the owner's privacy: the police publishing a private video on a device seized from a person in an investigation, which had nothing to do with the evidence the police gathered for that investigation? No, I don't think so.
That's not to say that's it's impossible the video won't "accidentally" leak, but given the sensitive nature of the context of all of this, I would hope that TPS is being disciplined enough to do the exhibits strictly by the book.
No, if the video is seized by police (and that's still a big assumption here folks) it will come out at trial, or not at all, I think.