My workflow which I use for scaling and generating frames in video on my rx 6800xt graphics card.

Scaling and generating frames for a 2 second video takes about 250 seconds after the models are fully loaded. The models are small so it doesn't take long.

It's not as fast, but it provides good quality.

All required models download:

Kijai-Wan2.1-T2V-1.3B

CausVid 13B lora

Clip encoder - umt5-xxl-fp8

Wan_2.1_vae

Required custom nodes:

VideoHelperSuit

ComfiUI-Frame-Interpolation