His very cute and looked quite content basking.
Here's a link to a few digital probe thermometers. This one is very cheap and you should be able to find it in your pet store.
http://www.amazon.com/Zoo-Med-Digital-Terrarium-Thermometer/dp/B000MD3MFA/ref=sr_1_31?ie=UTF8&qid=1412725520&sr=8-31&keywords=probe+thermometer
This is the one most of us use, they have it at Walmart & probably even Lowe's & Home Depot:
http://www.amazon.com/Chaney-Instruments-Acu-Rite-Thermometer-Humidity/dp/B001BO8CUE/ref=sr_1_2?ie=UTF8&qid=1412725595&sr=8-2&keywords=chaney+acurite
And, here's a temperature gun:
http://www.amazon.com/Nubee%C2%AE-Temperature-Non-contact-Infrared-Thermometer/dp/B00CVHIJDK/ref=sr_1_1?ie=UTF8&qid=1412725663&sr=8-1&keywords=temperature+gun You should be able to find one of them in Lowe's or Home Depot.
Bathing 3 to 4 times a wk is fine. Does he like his baths?
Do you have a guard (wire) over the heat bulb so that he can't get burned since he goes so close to it?
Here's a site that shows the best greens/veggies to feed in green print:
http://www.beautifuldragons.com/Nutrition.html When mine were babies, they liked escarole, endive, dandelion, mustard greens. Maybe he is tired of the collards and would like a different one for a change or even 2 of the best ones that are shown in green print. To give you an example, I feed my beardies turnip & mustard greens, escarole, dandelions this wk. I change them around but their favorites are dandelion and turnip greens.
Since he is so young, you should be dusting all the crickets he can eat in about 10 minutes but only dusting them one feeding a day. You should do that 5 days a wk. Then on the other 2 days a wk, you should dust all the crickets he can eat in 10 minutes but only dust one feeding a day. Here's where I've been getting my feeders.
http://www.lindasgonebuggie.com You can get 100 any sized cup of crickets for $5.00 which is a very good price. Scroll down about half way on this page and you will see all the $5.00 choices. You have to make sure to pick the size crickets you want. The horn worm in the video looked a little too big to feed him. I certainly wouldn't feed him ones that are bigger because he could get part of it stuck in his little throat and it could cut off his breathing. Do you have a lot of the big ones left?
And how do i tell if he's trunking or not.
Sorry, but I'm not sure what you meant by this.
Rather than using bark substrate which he could be eating & could cause some health problems, it would be better to use NON-adhesive shelf liner or even paper towels. When you use a loose substrate, it's impossible to clean up all the liquid when they poop so it could cause bacteria to grow which is NOT good.
Glad to see that you have Rep-Cal brand calcium, that's what most of us here use.