Currently looking at:
Lenovo IdeaPad Slim 3i 15.6" Laptop - Arctic Grey (Intel Core i5-1335U/16GB RAM/512GB SSD/Windows 11) 
which is on sale at BestBuy for $550 CAD (Boxing Week).
I like the price and everything looks good on paper, but wanted to get other opinions from someone more knowledgeable than myself when it comes to computers. Any advice would be greatly appreciated!

Goal: Replace very old laptop connected to TV.

Main use: Smooth 4k playback of YouTube, Netflix, other streaming sites to my 43" 4k TV via HDMI.

What didn't work: I tried using a cheap Mini PC but had to return it, because it was struggling even with playing 1080p youtube videos when connected to tv. I tried changing settings, installed the latest driver from the GMKtek site. Tried other AMD drivers but was getting Error 182 every time. So I eventually gave up. 
This is the Mini PC I tried: 
GMKtec G10 Mini PC for Home Office & Students - AMD Ryzen 5, 16GB RAM, 512GB SSD, 2.5GbE NIC LAN Office,Windows 11 Pro, Triple 4K Outputs, WiFi, BT, USB-C, DP.

My Question: Would I run into similar issues with Lenovo IdeaPad Slim 3i 15.6" Laptop or would it be able to deliver a butter smooth 4K playback on my 43" TV?

Thanks!

The Form

LAPTOP QUESTIONNAIRE

• Total budget (in local currency) and country of purchase. Please do not use USD unless purchasing in the US: $600 CAD
• Are you open to refurbs/used? No
• How would you prioritize form factor (ultrabook, 2-in-1, etc.), build quality, performance, and battery life? Performance: smooth 4K playback to 43" 4k TV (YouTube, Netflix etc)
• How important is weight and thinness to you? Not that important
• Do you have a preferred screen size? If indifferent, put N/A. N/A
• Are you doing any CAD/video editing/photo editing/gaming? List which programs/games you desire to run. No video editing or gaming. Basic tasks: browsing, watching movies online, word docs, PDFs, Emails.
• If you're gaming, do you have certain games you want to play? At what settings and FPS do you want? N/A
• Any specific requirements such as good keyboard, reliable build quality, touch-screen, finger-print reader, optical drive or good input devices (keyboard/touchpad)? Smooth playback to 4K TV.
• Leave any finishing thoughts here that you may feel are necessary and beneficial to the discussion. Thinking to get Lenovo IdeaPad Slim 3i 15.6" Laptop while its on sale. Would it work for my needs? Thanks!