Emart 2 x 15W Table Top Photography Studio LED Lighting Kit with Light Stand Tripod

Q: can these help with youtube videos?

That is what we bought them for to do YouTube videos they do help with bad lighting so the answer is yes if you want more professional you might want to upgrade though but I think they are good buy for the money

Q: Where can I buy replacement bulbs? I’m not seeing much when I search for 110w led

I bought 15W, natural light, 6500K LED energy saving light series from a store called, "Batteries & Bulbs". Service was great. Yuo should be able to find this on Amazon. I have two tripods flanking my copy stand and use it to copy small art work no larger than 16" x 20". Tripod and bulbs work greater. I hope this helps.