I like DanielJrStretch for general fitness and nutrition advice - his 'shorts' are good for delivering quick instructions for straightforward workouts. He's funny and motivating and very straight-talking! If you do not like being told not to eat like a toddler, look elsewhere!
Posture Tonic with Jacinta has a good six week course for Pilates with dumbells. I don't share her love for glute bridges, but I substitute those sections of her routines with Bulgarian split squats. She has masses of videos on her channel, but if you're looking for simple weights routines, that particular course is a good place to start.
Basically, with weights, I follow the 3 to 5 pattern: 3-5 movements (for example 3 to 5 out of: front squats, split squats, romanian dead lift, shoulder press, bent-over row, chest press, renegade row, lat fly) for 3 to 5 rounds, 3 to 5 times a week. I prefer to do full body workouts each time, rather than try and split my efforts between upper and lower body across the week. I have adjustable dumbbells, which are a bit of a faff, but cheaper and easier to store, and I as I have weights ranging from 5kg to 0.5kg, I can progress my workouts. And I reorganise the YouTube workouts if needed so that I'm moving from heavy weights for lower body, a bit lighter for core and some arm work, lightest for lats and delts. I do each exercise for its allotted 3 rounds, then adjust the dumbbells and move on. This minimises faffing around.
On the days I'm not doing weights, I work on mobility, do my press-ups and back exercises (I find the 'Strong Ballet Back' videos with Lazy Dancer good routines, and they're short). She also does good routines for ankle strength and balance. I did a cross training one from Athletistry (search Athletistry Cross Training for Dancers - if I link directly from here you might end up with a bunch of ads) this morning, and I'll do it again, it's a goodie.
there's so much on YouTube (I find it worth subscribing to YouTube Premium so you don't get ads) that it's easy to get distracted and zip between content. But really, there's no one perfect formula, and I know I won't do something that takes me more than 45 minutes, max. And as all the content providers say, consistency is the key. You can practice your balance by standing on one foot with your eyes closed while brushing your teeth. You can do your calf raises while the kettle boils. You can stretch while watching telly. Your body will thank you, but be patient.