Unable to share videos on WhatsApp since update

So I’ve had my OneR for a few months now and have really loved it on the whole.

However after the most recent update I am no longer able to share my videos over WhatsApp fir some reason. When I select a video on my phone (iPhone 8 on latest iOS) it starts processing then immediately gives me an error “This video could not be sent. Please choose a different video”

Have previously used it to share all my mtb escapades with a few WhatsApp groups i’m in with no issues (except compression when I switched to h265 briefly). Not changed any settings since last time I shared any videos (have double checked too).

Any ideas why this could be happening or how to fix it?

Thanks in advance for any help =)