I have limited experience with Tubi and Freevee. Tubi is more focused on movies, Freevee seems to be more focused on shows. Both work well and both are loaded with B and C-level content but you can definitely find some gems.
I still love watching Kitchen Nightmares with all the swearing. Wish they had done that when it originally aired on Fox but some people would be offended. I know I was because I don't like my shows watered down. I think its Filmrise that I watch it on.
I check out the Free section in Vudu on occasion, mostly for movies. Nothing great but I've been able to see a few things I intended to watch at some point but never did. The ads aren't too bad but ramp up more frequently towards the end of the movie. It's usually an ad for vudu though, so that gets repetitious.
I watch some old MMA stuff on Pluto but haven't found much else worthwhile there.
Pluto is great, They have both AVOD and on demand, and multiple local news feeds across country. I recommend Roku's Free tv service too -- you don't have to have a roku. https://therokuchannel.roku.com/
