I'm on youtube and I do have the Nikon D5100, our first SLR camera that I use on my first vlogs, but then it's too heavy and at the time we bought it, it cost almost Php 35,000.00 with bag, tripod and 8 gb memory card. Resolution wise, it's good, it depends on how you render your video after editing, but you can clearly hear noise on the audio. I do think you need to buy a separate mic with filter to reduce or probably remove the noise.
Now there are more compact, mirrorless cameras perfect for vlogging because it's lightweight, you can easily talk and do stuff while holding your camera. I've been eyeing the Canon G7x mark ii as my dream vlog camera. I've seen multiple reviews about it, being compared to Sony alpha series which nearly cost the same. It's mall price ranges between 30,000 - 35,000. Some online stores offers it for lower price but I'm not 100% sure it's legit.
If you want a cheaper one, you can also check Canon Eos M10. It ranges from 15,000 - 20,000. Same goes with Fujifilm ax10, but for Fujifilm, I would recommend it for photos and not videos, I've seen some video outputs of Fujifilm ax10/3 and I'm not really liking it.
If you also want to get underwater shots, nature, views and the like, you might also want to consider action cameras. I know GoPro has released their latest model but as we all know, it cost a fortune to buy just the camera and you still need to buy accessories. You can check Xiaomi 4k or SJCam (the latest one), it's cheaper than GoPro but the outputs are not bad. I owned an Sjcam 6 legend and it does look fine. you can check my video :
I just accidentally broke it after this trip
I now own (pre-owned) Gopro hero 4, bought it for cheaper price of course.
Anyway, there are also accessories that'll help you take a good video of anything, like tripods, gorilla pods, anti-shake pod/ stabilizer. And whatever camera you use to shoot, make sure that when you edit, you choose the right resolution as you render the video. And practice! I'm in no position to tell you this because I got a lazy ass when it comes to editing and posting consistently on youtube but yeah, practice makes perfect, and I'm sure you'll make a quality content!! Goodluck