Wow, OP, bet you're glad you started this thread now!
It doesn't matter what we think. It matters what YOU think.
It also matters where your mum is coming from. Is it a simple mistake, or is is something deliberate? Only you can answer that.
Instead of supporting your feelings on important things, to you, everyone has jumped on not having toys for 8 months, and being weaned too late 
I just wanted to see his face and I like to video this stuff for my husband who is missing out on a lot.
It doesn't matter if little one doesn't remember, or even if you don't. But when you video stuff, it's lovely.
Take DS2's birthday for example, do you think I should just let DS2 rip open his presents and not wait for DH? Or do you think DH would be pissed off? Of course he'd be pissed off! And if I did it, I'd be doing it knowing it would annoy/upset him.
We filmed him on his birthday, and it was lovely. So even though DS won't remember, and we'll probably forget, when we see the video...it'll all come flooding back.
Wishing your DH a speedy recovery 
Regarding your mum, explain gently, that you felt a bit upset about the 2 incidents. If she carries on regardless, then you know what you're dealing with.