I generally just use google. There may be a specialized app but I don't know about it. You can use google to search for it if you can come up with the right search terms.
One of the best sources is the podcasts actually vblogs themselves. Many of them have lists of other vblogs in a sidebar that they follow. Unless you are searching for actual podcasts which are audio only.
Here are a few that I follow:
Grand AdventureTr Bowlin good for site suggestionsDIY with Tito--excellent source of info about your RVWheelin ItThere are scores more.
Arctic Fox 25Y Travel Trailer
2018 RAM 2500 6.7L 4WD shortbed
Straightline dual cam hitch
400W Solar with Victron controller
Superbumper