I only have a Weber Genesis gas grill, but I'm thinking of taking my first stab at doing a tri tip soon on it following the directions from the video you posted about the tri tip tacos. Once I get my basketball tourney schedule for the weekend I'll be able to determine if I have enough time at home to go for it this weekend, or if it will be a post 4th of July experimenting.
Ended up doing two tritips last night - a little over 4 pounds of meat combined, purchased the prime tritip from Costco.
One I put a Cajun seasoning mix I had on, the other got a carne asada seasoning. Did each the same way in that I seasononed and put a little olive oil on each, placed in a ziploc to toss it around a bit and ended up leaving them in the fridge overnight. Took them out the next afternoon, and shortly before getting them on the grill I added a little more seasoning to each.
Weber Genesis - I bought the Weber Smoker box and picked up some hickory and pecan wood chips. Went with Pecan for this go round. Gave the chips a soak, put them on the grill with the left Burner at high. Wasnt getting much smoke, so based on some reading I had done, I added some dry chips to the box and let that go and the magic started. The temp was registering between about 250-275 - placed the tritips on the raised rack and let them go for 40 minutes - checked at that point with the meat thermometer and they were reading at about 100 degrees - flipped them, closed the lid and came back out about 15 minutes later and they were at about 115 degrees. At some point here all the wood chips had burned out so no more smoke.
Cranked the grill up to high just to put a little sear on the tritips - gave them about a minute on each side and pulled them off.
Let them rest about 15 minutes or so while I grilled some asparagus.
Sliced them and they were a very nice medium rare, maybe pushing medium. Received good marks from my 12 and 10 year old taste testers. My wife is not a fan of the smoky flavor, so she did not have much even though I said it was a minimal amount of smokiness that transferred to the meat. The 6 year old, who is usually will eat as much meat as the older 2 opted for the mac and cheese we made for the 6 and 3 year old my wife was watching for the night. Still, between my two boys and myself, there was maybe half a pound left, if that much, and I think I could have easily finished it off if I really wanted to.
My wife loved beef, steak, etc., just not a fan of smoked flavor - I'm thinking next time I may do the low/slow on the grill without the smoker box in there for her - as she likes that BBQ flavor, I may try do the next tritips with a simple BBQ rub, or just do some BBQ sauce and hope it caramelizes up a bit.
I'll still go with the smoke route from time to time, but have to be sure to have alternative options for the wife.
Wife is taking the kids to the beach this afternoon and likely staying for a bonfire - I'm planning on having the leftover tritip for dinner unless the kids decide to finish it for their lunch, but I doubt that they will. I hid it on the top shelf of the fridge to up my chances of it surviving the day.