Video sound dropping out

[GT30]

I have a paid service and I play a video with audio which I want to share screen with other participants. I have done this for over a year or more without any issues. Last evening and today I found the video played fine on the shared screen computer but on participants computers the video played fine but the audio kept dropping out numerious times whilst the video played. It was so bad that I had to disbandon the meeting. I tried it again today with other videos I have played in the past without a hitch but I have the same problem now happening on these payed videos. Has zoom changed something that is impacting on our playing videos. We have a weekly zoom meeting and I am rather bothered about this. Can you give me some support please