I would recomend the youtuber
Flock Talk. She has 31 tricks tutorials, and some of them are actually with her budgie, so.. if you want to see actual budgies learning the tricks, shes great.
I teached my tiel Aruan flight recall, stationing, going through a tunnel, spining and waving. I'm also curently working in ring toss (he can fetch but still having some trouble with getting the rings in the stick), laping and high five.
Most of these tricks i just learned (or... well.. he learned) because of her videos, i guess i might take some videos of his tricks later and post here (a friend of mine is also asking for videos of my baby doing tricks haha).
I just wasnt expecting that now that he know tricks he does them, without me asking for them, to see if i will give him some treats. He always kills me when he will just fly straight to our training perch (that actually is a chair) and start waving at me.