Personally, I would do it with free resources I already have.
Your laptop is different than mine. Your i7 sucks a lot more power than my Intel Atom.I went to youtube and found a 4K video. Then, I used a website to save it.
The best resolution it could save was 1080p (.mp4) Full HD. Then, I played this 7-hour video on my Yoga 730 15" 4K (i7-8550u). Set max brightness of the 300nits screen to max and battery mode to "high performance". Went to Nvidia control panel to switch to iGPU rather than Nvidia GPU. It lost 26% battery life every hour. It took 3.5 hours to use up 90% of battery life. Is this bad? Have I done something wrong? It seems to lose battery life twice as fast as your worse one.
Is my method correct? Is there any point to repeat the procedure with the Nvidia GPU turned on, with/without under volting?Your laptop is different than mine. Your i7 sucks a lot more power than my Intel Atom.
The Asus Transformers are known for long battery life, because they are very low power systems.
Video playback isn't really task intensive, so these devices suffice.
These Transformers aren't for gaming, Photoshop/Lightroom, number crunching, CAD , etc, etc, etc.
Basic web browsing, email, movies and music. Little travel devices.
Your method is "correct", if that's what you're trying to measure.Is my method correct? Is there any point to repeat the procedure with the Nvidia GPU turned on, with/without under volting?