5 month old and tv...

My boy just turned 5 months old and I’ve been putting Dave and Ava, this show that has a bunch of songs and the ABCs and I i usually put it on twice a day. Once around noonish for 30 min and then around 6pm for another 30min. Sometimes I’ll let him watch it and other times I’ll pick him up and I dance around and sing the songs. Everyone in my family keeps telling me not to do that. Tv is very harmful for him and he’s not gonna learn well or learn slower. They think I’m just lazy and have him in front of the tv all day but I don’t have him in front of the tv all day and now i feel like I’m such a shitty mom. 🤦🏾‍♀️😫