Thirdtube is what I use

you can use youtube in 3ds old , i have 2ds old and can show youtube

i use thirdtube but it is laggy

third tube is a great alternative, you can find it on universal updater

thirdtube all the way. however on old model 3DS's the quality is limited to 360p i'm preety sure

i mispelled pretty lol

thank you for all the help everyone